Lizzie had gotten fed-up.

Ever since their herd had merged with another herd of Tinysauruses, she had made some new friends in the underground caverns of the Great Valley. It was fun to start off with, but after meeting one individual, she wished they hadn't met them.

She, Dusty and Rocky were happy to play with some of the new little Longnecks like them, but there was always one black sheep in the flock... Whatever a sheep was.

Maxie.

He wasn't the bane of her existence, but she didn't envy anyone who was stuck listening to him blab on about himself all day. Which, unfortunately, was usually her.

He thought he was the king of the world, or at least the underground caves they lived in, and if she could take her own ears off just to stop listening to him talking on and on about how strong, smart and fast he was, she'd agree to do it without a second thought.

Day in and day out, it was the same.

"Hey, Lizzie. Did you hear I outran Rocky today?

 "Oh, Lizzie! Did you see me win that game of catch we played? You must be impressed by my speed!"

"Yo, Liz'! Tell me you watched me outwit that dumb old Thicknose?"

She and the others agreed, it was time for him to be knocked down a peg. The only question was how to go about it, and it didn't take long for the girl herself to give them an answer:

To give what exactly what he wanted.

If he thought he was the greatest thing since freshly-bloomed sun plants, why not have him prove it in front of everyone? A one-on-one match with an old friend of theirs, in front of the whole herd.

When they brought it up with him, in addition to his usual bout of bragging, Maxie accepted their challenge. And only a day later, it was time to get it on.

Naturally, they chose the biggest room they had in their home as their battleground, and Lizzie, along with the rest of their friends, as well as many others who wanted to see what was going on, were in the front row.

When he strutted his way into the room, Maxie was met with cheers and applause from his kin, including from the organisers of this brawl.

Of course, that was because they knew who, and what, he was up against, and how badly it was going to end for him.

Once he was in the middle of the room, taking his end in the fighting zone, he awaited the arrival of the representative of the away team.

But once they arrived, he may have wished they hadn't.

The loud sound of stomping echoed through the caverns, as something much bigger than what he expected started making his way towards them.

And if that shadow of what was coming their way was an indication of the size of the mistake he just made, it was far too late to back out.

As the footsteps got louder and louder, Maxie's bravado faltered. He started to back away from the centre, just as his opponent entered the room. In a very audible way.

*Boom* *Boom* *CRASH*

Parts of the wall around the entry hole on the other end of the room came smashing down, as the big girl made her entrance, forcing her way inside and shaking to get as much of the stony debris off herself as possible.

"Sheesh, would it kill you to make your holes just a little bigger?" The threehorn asked, looking at her friend with a grin that suggested she was just kidding.

If Lizzie replied to that remark, Maxie sure didn't hear it. He was too distracted by his opponent's arrival, and subsequently, her appearance.

Not only was she 5-10 times bigger than him, but she was nothing like he had ever seen. Orange scales with a yellow underbelly (and what a meaty belly it was), a stubby horn on her nose and a boney structure on her head, which made her look more like a Tinysaurus he was expecting.

In fact, "tiny" didn't seem like an appropriate word for this girl in the slightest. Everything about her was huge, in comparison to the dinosaurs living underground.

This was not good.

The crowd had quieted down a little upon her arrival, which was fine for her, when she turned to look at the little braggart across from her.

"So, you're this, uh..." She began, looking up at the ceiling for a moment. "Sorry, I forgot your name."

"Maxie." The blue-scaled Mussaurus boy answered her, sounding insulted that someone as great as him slipped the mind of this ignorant beast.

"Right, right, Maxie. So you're this guy who thinks he can take me, right?" Cera asked, not looking impressed.

"Hmph. You'll see that for yourself when you're egging for mercy, big girl." He replied, trying his best to look confident and cool.

It didn't work. In fact, it had the opposite effect.

With a chorus of "Oooooooh" from the spectators, Cera walked up to step into the ring, letting him get an even closer look of what he was up against.

She was even bigger and scarier up close, but the boy couldn't back down now. He had a reputation to uphold, and if he backed down now, he'd never hear the end of it.

Even if he lost this match, which was the most likely outcome, at least he could say he gave it a go.

And his deluded ego even told him that he could really beat her, if he was fast and smart enough.

"Ready when you are, tough guy." The girl said, taking a few steps back to ready herself for the match.

He nodded. "Yeah, I'm ready."

The two took their stances, and after a moment of tense silence, the battle began.

Maxie, being the headlong idiot that he was, charged straight ahead. His idea was to use his speed to avoid her attacks and tire her out, while looking like a hero at the same time.

But the plan was flawed from the beginning.

The moment he came even close to her, the giant reached her foot out and squashed him to the ground like a bug, a cloud of dust wafting in the wake of the impact.

That should've settled the fight right then and there, and in a lot of ways, it did. But neither competitors were done yet.

Cera hadn't finished humiliating this guy, and Maxie wasn't ready to throw in the towel yet.

The former took her foot off the latter's body, allowing him to get up again.

His face and chest were scratched up and dirty, but he had no serious injuries. Yet.

"That's it? I've been through worse." He said, acting like he wasn't just flattened a second ago, shaking off the dirt from his body and readying himself in a battle pose.

As expected, the triceratops wasn't fazed in the slightest by his retort, just shrugging her shoulders.

"Suit yourself." She said, waving her foot to tell him to bring it on.

He did just that.

Again, Maxie charged towards the much larger girl, and again, Cera stopped with ease.

But not by just squashing him like the previous time.

Instead, she took a step forward and leapt into the air, raising her four legs up as she did.

"Wheee~" She exclaimed, letting gravity do the rest when she was right over his tiny body, landing on her chubby belly and causing a minor earthquake throughout the room.

"Aarrgghhh!" Maxie cried, getting squished under her full weight, along with more than a few bones cracking and crunching as he got pressed into the dirt.

Cera was a lot of things, but light sure wasn't one of them.

The Tinysaurus felt like the whole cavern had come crashing down on top of him, and his supposed unrivalled strength couldn't take a full-on belly-flop from this girl.

After a moment of letting her own bodyweight do the job, the larger dinosaur stood up again, freeing her foe from the prison of her stomach, which left him looking like a pancake, with a face and limbs sticking out.

And even more to his humiliation, he was suddenly stuck to her belly, unable to let go.

"Oops." Cera said, not sounding sorry in the slightest. "Wow, you must really love my belly, don't ya?"

He didn't respond, as his head was currently spinning after being buried under her fat, squishy gut.

"You want another go? 'Cause I'm more than happy to keep this up." She asked, prior to shaking him off her hanging tum-tum, letting falk & roll on the ground like a rag doll.

As he laid there, groaning and feeling like every bone in his body had been broken, he heard the sounds of the crowd cheering and laughing, taking joy in his losing status.

He couldn't stand for this, even if he couldn't actually stand, either.

Losing would've been one thing, having his reputation shattered in front of everyone he knew by this blubbery brute, but losing to a girl? He'd never live this down.

But before he could try and get up again, his opponent stepped forward and pinned him down, holding her foot on his small neck and looking down at him, an amused smile on her face.

"You had enough, or are you ready for more?"

He couldn't respond. She was literally holding him down, and it wasn't even hard for her.

She could've kept this up for days, maybe even weeks.

But as far as he was concerned, so could he.

"N- Never! I'm not losing to a stupid, fat girl like you! You hear me?!" He declared, struggling to lift her foot off him.

She didn't reply. Instead, her smile turned into a frown, as she leaned down to glare at him.

"You shouldn't have said that..." She warned, putting even more weight onto him, and his body was forced even further down into the dirt.

His air supply was grttinng cut off, and as he struggled to breath, Maxie saw her open her mouth, before closing it with full cheeks.

"Ptoo!"

The gathered saliva was then let out all at once, as the threehorn spit right in her opponent's face, coating him in thick, sticky drool.

He coughed and spluttered, feeling the smelly liquid trickling down him, and his already-broken body felt even mentally weaker as a result of that last attack.

"Argh! Ugh! Gross..." He gurgled, coughing and spitting some of the nasty substance out, which seeped into his mouth.

"That's for calling me dumb." Cera snarled, before continuing her torture of this little punk with her next move.

Once she removed her foot from his body, she swiftly turned around and lifted her tail, looking back at him and wiggling her rump.

"And this..." She began, before leaping her back legs up and readying to smash him with her big, plump posterior. "Is for calling me fat!"

Maxie barely had a chance to look at what she had planned, before it came crashing down on him.

"SQUELCH~"

Cera landed flat on his whole being, the force of her large rear-end landing on him, caused a loud crushing noise throughout the caverns;  her big, wide, wobbly ass slamming down on him like that sounding like the equivalent of a meteor hitting the planet to the smaller animals.

A chorus of "Ooooof" rang from the wincing crowd, only imagining what she had done to the little guy. If he wasn't dead from that, surely he'd have to at least be paralysed.

Whether he was or not, Cera didn't care. She took delight in throwing her weight around, and this was demonstrated by her grinding her fat rump on him, like she was sitting on a chair.

"Mmm~ Yeah, that's better." She sighed, her eyes closing as she enjoyed herself. The feeling of crushing her foe like this under her butt was just too good for her.

And it was about to be made even better, when an idea and an opportunity arose. A low rumble came from inside her, namely in her bowels, and she couldn't resist the chance to really show him who was boss.

From Maxie's perspective, everything was a heavy blur. All he could see was dark yellow, and his whole body was being sandwiched between this colossal rear and the hard ground, leaving him struggling to move.

Moreover, struggling for air.

The impact crashing down on him knocked the wind out of him, and the weight of her big behind on him wasn't helping him breath any easier, either.

And the worst part was, he was stuck in the worst place possible. What he COULD smell was anything but pleasant, and even with his head being crushed like this, he could make an easy guess where that horrid scent was coming from.

And when he heard that rumble, up close and personal, he felt his heart sink lower.

'Oh no... Don't tell me she's gonna...' He thought, fearing the worst, his eyes widening as much as they could under her butt.

But alas, his prediction was accurate.

*PPPPBBBTTTTTHHHHP*

A foul, rotten stench wafted from the threehorn's hindquarters, as her backdoor opened up to let the trapped dino below know who was boss.

The fart was easily as deadly to him as any sharptooth could be, the rancid air filling his senses and making his vision fade into black.

Noxious fumes entered his nostrils, and the toxic air made its way down into his lungs, his body shaking and his mind shutting down.

The other dinos, those who didn't want to risk breathing in that horrible gas, backed away from the scene, although the majority of them fell victim to its wrath.

How any dinosaur, let alone a female one, could smell this bad, they didn't know, but they did know that this was the worst possible thing to have happen.

Envy Maxie, they did not.

Speaking of, with his passing out due to the powerful release of ass gas, Cera was easily the winner of this bout.

"Aaaaaahh, that's better." She sighed, the relief from that build-up being let out being very audible.

When she got back up, she didn't see her opponent, instead feeling something pressed against her butt, which brought an evil smile to her face.

'I think I'm gonna enjoy my prize~' She thought, standing up and looking back at her victory.

There he was, Maxie, stuck between her cheeks. He was unconscious and his face was covered in her sweat, saliva and now flatulence.

She could probably shake him off like she did with her belly, but she had a better idea. He needed to understand the gravity of the situation he threw himself into, and she had just the punishment for him in mind.

A few days INSIDE her butt should teach him~

Aiming her aim at her pucker, where his head happened to be, the triceratops began pushing the boy through her backdoor, the hole slowly swallowing him up.

He didn't wake up, not even as his head and neck went through her anus, his body being pulled into her big butt and leaving his lower body as the only parts visible, sticking out limply.

"Ohhhh, yeah~" The cheeky girl moaned, pulling her tail back and repeating the process, pushing more of him inside her rectum.

As she got to the base of his legs, where his body got a little wider, Cera moaned in pleasure, feeling a familiar tingle in her lady bits.

Although as she continued, she realised he was stuck, and wouldn't budge any further inside her rump.

"Hrrrrrgggghhh!" She grunted, straining and using every ounce of power she had to get him through. "Come on... Come on, get through...!"

With a bit more effort and another thrust with her tail, his front legs slurped their way into her backdoor, resulting in a pleasurable jolt from her anus, and her letting out an "Oooohh~" as a result.

Now the only parts visible were his back legs and his tail, the former of which she pushed inside her ass with her tail as well, before the physics of absorbing his little body pulling in the latter as well.

Second by second, more of Maxie's body vanished from the outside world, trapped inside the tight, smelly confines of Cera's anus, until he was fully gone.

Once he was completely inside the anal passage, her butt-hole closed over the tip of his tail, squeezing him about and making his new host groan in sheer delight at the feeling of getting her shitter filled with him.

Belly-squashing him, footcrushing him, spitting on him, sitting on him and farting on him. These were all well and good, giving her a sense of power and establishing her dominance over him, but nothing compared to this feeling of control.

"Mmmm, you're such a tight fit. Just how I like them~" Cera whispered, smiling and shaking her booty around, showing herself off to the rest of the room.

Every other member of the Tinysaurus herd clearly weren't expecting her to go this far with their arranged match, but they didn't seem to mind, either.

As long as Maxie was finally getting what was coming to him, none of them cared. And from the way things looked, it appeared like that would be the case.

With everyone watching her, seeing her as the victor of the fight, combined with the sensation of her anus welcoming this new guest, Cera couldn't restrain herself any longer.

Leaning her front half down, Cera reached a foot back to her dripping cunt, giving herself a shameless massage.

"Mmf~ Yeah..." The big girl moaned, playing with herself like no-one was watching the dirty display. "I don't know what's better; winning, or having this loser fill my butt up so much~"

Her words were followed by the sound of her wet slit being pleasured, the girl moaning and grunting as her arousal was on view for everyone, and yet she didn't care.

"You feel so good in there... Right where you belong~"

He wouldn't have been able to hear her even if he was conscious, but the message was clear.

Maxie, the "greatest, strongest, fastest and most intelligent" of the underground herd, was just a butt-plug for this fat-assed, three-horned cow of a dinosaur, and would stay that way for the foreseeable future.

The sense of power was getting to her head, as was her insatiable arousal, and before long, her orgasm was on its way.

"Oh, oh, o-oooohhhh, yeah~" She grunted, rubbing her pussy faster and faster, feeling her climax building up within her.

Thoughts of the "battle" flashed up in her mind; she was basking in thoughts of how weak and powerless the little runt was against her. How she had squashed him under her belly, sat on him and buried him under her rump, and her knockout move finishing him off in the most humiliating way in front of everyone he knew.

Those thoughts were more than enough to send her over the edge, as the triceratops screamed in a mix of power and pleasure, her climax hitting her like a rock wall.

"OOOOOOOOOHHHHH, YYYYYYYEEEEEEEEEAAAAAAAH!!"

Wave after wave of ecstasy coursed through her body, her anus squeezing the little dino's body, making him shift and squirm, causing her to moan even more.

Just when she thought this couldn't get any better than it already was, in the midst of her climax, the pleasure got all the more intense with the feeling of squeezing him in her ass even more.

"AAAAAH, OOOOH, AAAARRRGGHH, MMMMPPHHH~!"

Cera cried out, feeling her insides squeeze and contract, pushing his tiny form deeper into her, making him fit tighter and tighter, and bringing her even more pleasure.

It was a mind-wrecking sensation, the strongest orgasm the young lady had ever witnessed. Her legs were shaking, her face was flustered and her breath was erratic.

She was enjoying the best climax she'd had in years.

It wasn't until the last of her orgasmic waves had passed, that Cera was able to let herself relax a bit, panting on the ground with an exhausted look.

The rest of the room had cleared out, the spectators leaving her alone to deal with the aftermath, as the threehorn was resting on the floor.

This was one hell of a playdate, she had to admit.