fart stain 

a stain found in your undies.... like after you have a viscocity fart

i have a fart stain!

fart stain by Ciske November 2, 2003

Fart stain 

When u fart and it leaves a stain

Yo there’s a fart stain in my undies after I just ripped ass

Fart stain by anonymous September 26, 2020

Alabama fart stain 

The act of putting a fart into a jar and putting into a womens anus

Yo babe i hope you got jars. Why? Because were gonna do the Alabama Fart Stain

Alabama fart stain by anonymous September 18, 2021

Fart Stainer

A fart stainer that stains your pants leaving a brown skid mark,also can be used to abuse somebody

Hey you "Your a fart stainer"

A wet fart slips out by accident you have not followed through but you have just stained your pants with some fart juice.
Can also be mixed up and changed by calling somebody a stain head they will get the drift

Fart Stainer by Roberto83 December 6, 2009

fartstance 

That subtle and clearly recognizable slight raising of a rump cheek, to allow a fart to freely escape.

Look at that fartstance, there’s no question he has terrible gas!

fartstance by Dr Bunnygirl November 6, 2018

fartstain 

visible markings left typically in the undergarments of a personage having passed a flatus can be a spry alluding to a person as useful as the preceding definition

As Johnny disrobed his boxers sported a mustard brown fartstain.

fartstain by schultheis, sj July 4, 2006

FartStain 

Name for someone who has skidded in their pants,
this can be adapted to many names, including the words, stain, skid, mark, fart, brown.

"Hey did you know that Ben skidded in his pants?"
"Hahaha GO ON FartStain"

FartStain by Dan.Smith December 21, 2007