It was the Friday after Rainbow Dash had become friends with Pinkie Pie, near the end of the school year. Rainbow Dash had taken a shower that day, but hadn't washed since so she smelled bad once again. Not that her shower had gotten her smelling very clean, either.

Rainbow had formally introduced Pinkie to Rarity, and they made an effort to not fart in front of her. Rarity tolerated Rainbow's grunginess so the least she could do was not subject her to her very unladylike flatulence. Rarity did think Pinkie was kind of funny, and they became fast friends.

She was currently in gym class, at the start of the day, and finished running five laps to warm up. Actually, she ran six, finishing as the other students ran their fifth lap. They sat down to take a break. Rainbow sat next to Pinkie, who didn't mind the smell, and a bit of a distance behind everyone else.

As the coach gave a pep talk, Rainbow Dash let loose with a flurry of wet farts. Pinkie started to laugh her butt off. Fortunately she used the bathroom before class today, so her shorts were only damp with sweat.

The coach barely heard it and continued as if there was no interruption. However, over the next few minutes, Rainbow's farts became wetter and stinkier. Soon, Rainbow could feel an intense pressure in her bowels that had nothing to do with gas. She raised her hand.

"Coach! I gotta go to the bathroom!"

"Don't take too long," said the coach.

Rainbow ran to the bathroom as fast as she could, letting out a few dirty farts along the way. She made it just in time, and sighed as the very wet contents of her bowels splashed into the toilet.

She flushed, and reached for the roll of toilet paper, for even she wasn't so dirty as to not use it, and usually after a dump like this she'd have to wipe at least ten times. To her dismay, there was no toilet paper. She pulled her shorts back up and searched the other stalls. Nothing.

Rainbow ran back to the track, her butt feeling dirtier already. On the way she ran into the janitor, and told him they needed more toilet paper in the bathroom.

"Did you make it?" asked Pinkie as Rainbow sat down next to her again.

"Yeah," said Rainbow. "But there was no toilet paper."

Pinkie giggled. "Good thing you like being dirty."

Rainbow laughed a bit as well.

...

Rainbow sat through her English class, fidgeting a bit in her seat and scratching her dirty butt. After that it was recess, then math.

When the clock struck twelve for lunch, Rainbow made her way to the cafeteria, but stopped in her tracks as she saw two girls bumping into each other.

One was Trixie, the school bully, who was not as great a magician as she'd like to think and took her frustration out on other students.

The other was a shy, quiet girl that Rainbow Dash sometimes walked by in the halls. She was yellow with long pink hair, and was wearing a white tank top and a green skirt.

Trixie grabbed the other girl by the shirt. "Watch where you're going, Fluttershy!"

"I'm sorry..." Fluttershy stammered nervously. "I was just on my way to the bathroom."

"That's no excuse for bumping into the Great and Powerful Trixie!"

"But... I have a really small bladder, and I really-"

"Let's see if it can take a wedgie over your head!"

"No... please don't..." Fluttershy blushed at the intense humiliation that was to come.

"Hey!" Rainbow Dash walked over to Trixie. "Leave her alone!"

"Or else what?" said Trixie.

Rainbow could have beat her up, but she decided to defeat her another way. She grabbed Trixie's head and forced it into her stinky armpit.

"Ugh!" Trixie recoiled at the first whiff and fell on her butt. "You really need to learn to shower, girl!"

Then Rainbow grabbed Trixie's head again and forced her face into her butt, which smelled worse than usual today.

"Ugh! That's even-"

BBBBBRRRRRAAAAAAAAP! PPPBBBLLLRRRRT!

Trixie's blue face turned green and she gasped for air, nearly vomiting at the stench of Rainbow's loud, sloppy, wet fart. She ran away from Rainbow as fast as she could.

"Are you all right?" Rainbow Dash asked Fluttershy.

"I'm fine, thanks to you," said Fluttershy, who looked relieved rather than disgusted, but was holding herself with both hands and fidgeting slightly.

"Let's get you to a bathroom before you run into any more trouble."

Rainbow led Fluttershy to the nearest bathroom and she ran into it. About thirty seconds later she came back out.

"I didn't make it," Fluttershy said, blushing beet red.

"Don't feel bad. The same thing happened to me twice. Here, let's go back in and you can wear my skirt for the rest of the day."

"Um... No thanks. People will wonder why I'm suddenly wearing your skirt, especially when it... smells like that. No offense."

"None taken, and I understand. Maybe you could take a dip in the fountain and say you wanted to cool down? It is a hot day."

Fluttershy visibly relaxed. "Sometimes I go into the fountain anyway to play with the frogs. It's the perfect cover up."

"Then let's get you there before someone sees you."

Rainbow grabbed Fluttershy's arm and ran outside with her, stopping at the large fountain outside the school. Fluttershy submerged herself in the fountain, except for her head, playing with the frogs for about a minute before standing up, soaking wet, and walking with Rainbow Dash to the cafeteria.

"Thank you for saving me," she said. "Twice. I'm Fluttershy."

"I'm Rainbow Dash. Sorry about the smell. I don't wash very often."

"I don't mind. You saved me from Trixie. And with you smelling like that, I don't think she'll pick on me again."

"I hope you don't mind the farting either. I think it's fun to fart, and I can get really gassy sometimes."

"It's all right. Especially if it'll drive her away. Just, don't do it too close to my pets when you're at my house."

"So, you like playing in the fountain with the frogs?"

"I really love animals. I have so many pets at home. Mostly bunnies, birds, mice, and squirrels. I usually play with the frogs at the end of the school day, but..." She blushed lightly.

"Since you like doing that anyway, no one's gonna question you."

They reached the cafeteria, and found the table Pinkie Pie and Rarity were sitting at.

"Rarity, Pinkie Pie, this is Fluttershy," said Rainbow Dash. "I saved her from Trixie. I don't need to go into details in front of Rarity, but Trixie's gonna leave her alone from now on."

"It's probably best if you left out the details," said Rarity, who had a good idea of what Rainbow Dash might have done. "But, she deserved whatever she got for throwing me into the mud." She was surprised to hope that Rainbow had been as disgusting and unladylike as possible with Trixie.

"Rarity's the opposite of me," Rainbow explained to Fluttershy. "She hates getting dirty. But, we're still friends."

"Um... hi," Fluttershy said to Rarity and Pinkie, blushing a little.

"Nice to meet you, Fluttershy!" said Pinkie, shaking her hand vigorously. "Were you playing in the fountain with the frogs again?" She had walked by Fluttershy on the way home from school a few times as she did so.

"Yes." Fluttershy blushed a little more, hoping no one would ask why she did it earlier than usual today, but Pinkie and Rarity thought this was just out of shyness.

"We should do that together sometime!" said Pinkie. "It sounds like fun!"

"It is." Fluttershy giggled a bit.

"You are quite lovely," said Rarity. "Maybe I could give you a makeover some time?"

"That would be nice." Fluttershy liked the idea. She'd always wanted a makeover.

The four friends enjoyed their lunch together. Rarity, Pinkie, and Fluttershy sat close enough to Rainbow Dash to have a good conversation with her, but not close enough to smell her over the food and spoil their appetite. Besides, Rarity's perfume was just as noticeable, like a counter to Rainbow's odor.