A Messy Mailmare

by Odlaw

Rating: mature
Tags: Anthro, Porn, Fetish, Derpy Hooves, Sex, Profanity, Slice of Life, My Little Pony: Friendship is Magic
Length: 1972

While out delivering packages in Ponyville, Derpy eats one of Pinkie's latest experimental muffins. Unfortunately for her, it has some messy side effects....

Warning, this story contains taboo fetish content that you may not subscribe to. If softcore scat is not something you enjoy reading, turn back now.

While out delivering packages to the good ponies of Ponyville, Derpy is given one of Pinkie Pie's latest experimental muffins to try. Unfortunately for her, it starts to have some unexpected and eventually messy side effects...

Cover art is too hot for fimfiction so It cannot be linked here. If you need it for 'research' purposes, as it involves the same fetish content depicted in this story, look for the artist: 'Kloudmutt' on Derpibooru. It is one of his older works and one of my personal favorites.

Published 2019-05-27 06:00:01 UTC
Last updated 2019-05-27 06:00:01 UTC

--Derpy's Delayed Delivery--

Derpy happily hummed as she soared through the clear skies over Ponyville, a cart full of packages floating along behind her. She proudly sported her official mailmare uniform, a short dark blue pleated skirt, a beige button-up shirt, and of course, her trusty mail cap. The cart was attached to her via a leather harness, connected to the cart's outstretched wooden arms that flanked her hips on either side.

With a content sigh, she glanced down at the list of addresses in her hand. The first was already crossed off. It had been a rather large package for the Cake family, likely some new baking supplies for a big project of some kind.

While she was there, Pinkie Pie had presented her one of the latest in a line of experimental muffin recipes that she was developing. Never one to turn away a tasty muffin, Derpy had quickly scarfed it down. It was absolutely delicious, tasting almost like chocolate, yet also with a hint of something else that the mailmare couldn't quite place. After finishing the treat, Derpy thanked Pinkie for the muffin and went on her way.

Ever since she had been enjoying a pleasant warmth that seemed to radiate from her soft belly. She felt so happy and full, despite only eating a single muffin! She hoped that Pinkie planned on making more of those...

Derpy suddenly realized that she was drooling as a drop of saliva landed on her list. Shaking her head, she decided to focus on the task at hand before she made herself late again. Looking back down at her list, she read out the destination of the next package.

"Sweet Apple Acres." She mumbled, face lighting up as she said the words. She loved making deliveries to the Apple family!

However, their farm was all the way on the other side of town. She would have to hurry if she wanted to get there on time. Turning sharply, very nearly spilling her packages in the process, Derpy fluttered her wings as fast as she could, making a b-line for the farm...

A few minutes of flying later, Derpy finally spotted the edge of an apple orchard as it was coming into view at the far side of town. Slowing down and checking her watch, which happened to be upside down, she let out a sigh of relief. She'd managed to make up valuable time in her haste, giving her a few extra minutes of breathing room. The last thing she wanted was to make her boss mad for being late again.

*Pwwffft*

Suddenly a small whisper of gas leaked from between Derpy's butt cheeks, startling her for a moment before she realized where the sound had come from. Groaning, she felt her tummy rumble grumpily. All the warmth she'd been feeling on the way here was gone, replaced by a strange tightness that had settled into her lower stomach. It seemed like something about that muffin wasn't sitting right with her after all.

"Mmph..." She mumbled, pausing for a moment as she stared down into the many apple trees passing beneath her.

In the past, a sweet juicy apple had proven to be quite effective at calming an upset stomach. Surely the Apple family wouldn't mind if she took just one. As much as she hated the idea of stealing from anypony, if this got any worse, she might not be able to deliver all her packages! The last time she had to call off for the feather flu, her boss had not been pleased.

Derpy looked around quickly to make sure nopony was watching. Then, assured that she wouldn't be caught, she floated down, taking her cart with her. Once safely on the ground, she unfastened the belt, attaching her to it and flew up underneath one of the taller apple trees.

Bright red juicy apples hung down from its branches, each one looking fresh and ready to be eaten. Derpy made one last check for any potential witnesses before reaching up and swiftly plucking one. Just at the sight of it resting in her hands, her tummy was already starting to feel better.

With a satisfying *crunch*, she chomped into it, the juicy flavor exploding into her mouth.

"Mmm!" She hummed, wings ruffling in delight as she relished in the taste as long as she could before finally sending it down.

"Ahh~."

Derpy patted her tummy as she felt the chewed apple fall into her stomach. She licked her lips as she proceeded to devour the rest of the apple in just a few seconds. She'd have to ask about buying a few more once she arrived at the farmhouse. Maybe she'd even slip in a few extra bits as payment for this one.

Feeling satisfied as her stomach started to process what she'd given it, Derpy flew back down to her cart, hastily reattaching the belt harness around her waist so she could keep moving. But then, just as she was tightening it, her stomach suddenly seized, cramping hard and causing her hands to jerk. The tight feeling from before had returned with a vengeance, more volatile than it had been before. It was focused much lower now, centered in her gut.

*Pwwfprpt!*

Another more audible fart ripped from her cheeks, far more potent than the first had been. Derpy's eyes widened as she felt the tightness shift down as something heavy dropped into her rectum.

"Oooh! I need to go!" She squirmed, quickly clenching her legs together as she felt a massive presence start pushing at her back door.

Derpy quickly scrambled to unfasten the belt again so she could find a tree to squat behind but gasped as she realized what her jerking motion had ended up doing. The belt was caught onto itself, somehow wedged in a way that didn't even seem possible. She wrestled with the belt, but all her efforts to loosen seemed to do just the opposite, further constricting it around her waist as increasing the sense of pressure in her bowels.

Giving up on that as she felt another cramp coming, she tried to lift herself out of the harness, only to find that her efforts to loosen it had now made it too tight for her hips to fit through.

*Fplarpt!*

A third fart sputtered out of her, this one sounding much deeper and bassy as she felt something wet splatter into the back of her cotton panties. She was running out of time. The pressure in her bowels was almost unbearable now, growing more and more intense as it forced her to divert focus into keeping her puckered anus clenched shut. But it was a losing battle, she had to think of something fast before she was hit with another cramp.

Realizing she might be forced to go where she stood, she at least wanted to avoid messing up her uniform. Reaching down, she pulled part of her skirt before grabbing the hem of her once pristine white panties to yank them down. But instead, she was surprised to feel them resist her efforts. Craning her neck down, she was mortified to discover that a small piece of metal from her belt had torn right through both her skirt and panties as she was struggling with it, catching both of them together in a knot.

"No, no!" Derpy desperately begged, feeling her anus start to widen of its own accord as the massive presence in her bowels began to force its way out of her. She fought hard, but it was pointless as one final cramp crashed into her.

A gassy crackling signified the slow emergence of her first log, peeking out from between her cheeks as she strained fruitlessly to keep her waste contained. But her bowels were having none of it, betraying her as they started to encourage the bowel movement.

*Ppffftchhk!*

Derpy gasped as the long turd slithered out, tenting the fabric of her panties. Her legs trembled as she stood there in shocked silence, legs crossed as the slender log of poop coiled up over itself insider her underwear. A huge bulge began to form, sagging down under her ass and filling her with shame as she felt the warm mess smush and spread against her supple ass cheeks.

Eventually, the first log tapered off, the last of it falling down to join the pile resting in her panties. But before she could relax, a second slightly smaller one prodded at her anus.

With a defeated sigh, her face blushing intensely, she finished the job and started to push. The second log felt much softer than the first, smushing over the thick and smelly bundle of shame already resting in her panties.

But even as shame filled her, Derpy couldn't help but feel immensely relieved. The unbearable tightness that had been building in her gut was gone, leaving her once again feeling warm and considerably lighter than before. Aside from the weight hanging down under her ass.

*Snap!*

Suddenly, the belt around her waist loosened, falling to the ground and ripping her skirt away with it. With that gone, Derpy was left standing there, legs still pressed together and a hefty pile of poop in her panties.

With a sigh, she tentatively reached back, cautiously poking the bulge. It felt warm and sticky, squishing slightly under her finger. Bringing her hand back around, the tip of her index finger now featured a small brown smear.

Face still glowing bright red from embarrassment, Derpy slowly hooked her fingers around the hem of her ruined panties and lowered them down. As the mess peeled away from her cheeks, it left behind a thick layer of brown muck. Stepping carefully out of her panties as she let them fall to the ground around her ankles, she pondered what to do now. Checking her watch, her ears went flat. She was late.

She was determined to, at the very least, deliver this one package before she headed back to the mail station to get changed. Picking up her panties with two fingers, she held them far away from herself as she looked around for a place to dispose of them. She had no idea where any outhouses might be in the orchard. Praying to Celestia that nopony would find it, she quickly tossed her soiled undergarment behind a random tree.

With haste, she quickly snatched her torn skirt from the ground and did her best to put it back on, being forced to hold onto one side so it wouldn't just fall down again. The belt itself appeared relatively unharmed, and she reluctantly reattached herself to it, making sure that it was much looser this time around. Then with a hesitant flap of her wings, she took to the air, shivering as she felt the breeze caress her filthy behind and anxiously squirmed as poop squished between cheeks...

Big Mac stood there, utterly baffled as he tried to make sense of what he was seeing. Why exactly had he just found a pair of mare's panties, filled to the brim with what looked to be fresh manure, behind the same tree where he had also hidden his secret doll.

"Ehh, nope." He cringed, carefully retrieving his doll from where it had been sitting right next to the ruined undergarments. He'd hoped he could find a way to get the smell off of it...

Author's Note

Felt inspired to write a quickie involving everyone's favorite adorable mailmare having a little accident. I Hope you enjoyed! And don't worry, her boss won't be too upset with her. Quite the opposite actually...

(May do a sequel chapter at some point in the future if you guys want it. I will leave it as 'unfinished' for now.)