butt must 

The odor, often redolent of swamp ass, related to perspiration in the region of the thighs and buttocks; may be caused by improper attire as well as poor personal hygiene, the walk of shame, road marches in Texas, deployments to deserts, or Mormonism.

"Dude, I was on the train the other day and there was this fat chick who must have been the target of a gang bang her butt must was so bad."

butt must by Myconfidence October 23, 2006

Butt Mustard

The greasy residue left in your underwear.

Butt Mustard by Stuart Cox May 31, 2003

Butt Mustard

The tangy yellow spread secreted from the anus during copulation - often used as a spread on chicken sandwiches.

Man, gimme some more of that butt mustard yo, my sandwich is dry.

Butt Mustard by John November 12, 2003

Butt Mustard

The pasty by product of a long days work, and a bad wipe job after a long night of drinking beer and eating too many hotdogs.

Hey, look at the back of your pants, looks like you have a bit of Butt Mustard there.

Butt Mustard by The Tatooed Nail Bender February 13, 2004

Butt Mustard

A fart that seeps out a little bit of liquid. Similar to a shart, but much less solid. Usually occurs after a heavy night of drinking.

When I farted, I thought it was okay, but then I felt the butt mustard squishing between my cheeks.

Butt Mustard by stanleyroper July 15, 2005

Butt Mustard

The mix off blood, cum and shit that is often created during anal sex. It's dirty brownish yellow color and thick, soupy consistency resembles Dijon mustard.

How am I ever going to get that Butt Mustard off of my sheets before my girlfriend gets home?!?!?!

Butt Mustard by Dan Lyons December 28, 2008

Butt Mustard

Another way to describe the shit that comes out of a baby, it gets it's name from the color and consistency

You have to change little Johnny this time, I had to deal with his butt mustard last time!

Butt Mustard by Metallicajunkie October 4, 2018