butt quack 

(n.) a fart that sounds like a duck quacking

Last week I was on Zoom when Gary let out the loudest butt quack.

butt quack by n30e April 28, 2021

Butt Monkey

Someone who has an invisible, permanent "Kick Me" sign taped to their back.
They're the butt of almost any demeaning joke, they commonly have horrible luck, and a large amount of horrible things happen to them. Their existence is just to solely have horrible things happen to them. If anything positive happens to them, the person usually gets screwed over in the end.

Charlie Brown from Peanuts is probably the best example for a "Butt Monkey".
Bill Dauterive from King Of The Hill.

Butt Monkey by Sadow August 31, 2013

Butt nugget

Any unwanted chunky debris hanging within the recess of one's butt. Butt nuggets normally require a concentrated effort in order to remove them, such as but no limited to: heavy wiping with toilet paper, or hot water and soap.

Butt nugget by Oracle October 27, 2003

Butt Fumble 

When a shart goes beyond conventional means. A solid clump of poo that is not recoverable by a clench of the buttocks requires a unique set of variables at play. The fart needs to have enough force to propel the fecal clump fast enough to escape the clench reaction of your standard shart. The clump itself has to be hard enough so it can then further damage your reputation by enlisting the aid of gravity and visibly appearing at the bottom of your pantaloons (if loosely fitting of course). An added variable, but not required, is that said fecal matter fall out of your pants all together, making you want to take a similar route off of a bridge or tall building.

Billy decided it a good idea to pass gas in karate class while in the ready stance, but instantly realize he had committed a butt fumble. He was further humiliated when the turd landed on the dojo floor. Master Rubie was thoroughly discussed and scalded him by saying, "You gross little boy! Go wipe your ass and clean up my floor!".

Butt Fumble by Triplstx January 22, 2014

Butt Sex 

Any sex involving the anus. There are three degrees to butt sex:

1. Regular butt sex. That is anal sex involving plenty of lubrication and great care to avoid injury.

2. Rough butt sex. Anal sex involving little lube by those who like it rough. Spit or similar substances may also be used.

3. Angry butt sex. No lube, no preparation. Obviously not a very happy time for the recipient.

1. The kind of butt sex most people have.

2. Think Brokeback Mountain.

3. ...ummm....I don't think this actually happens.

Butt Sex by The mighty anonym June 8, 2007

Butt crumbs 

also known as Arse dandruff and Poo-flakes

small specks of poo that fall down on to the toilet seat while wiping. Particularly visible on white toilet seats (but carpets do an excellent job of concealing them). Usually observed among those with hairy cracks and high-fibre diets.

Son: Dad, did Uncle Jim come to visit again?
Father: Yes, why do you ask?
Son: I saw some butt crumbs on the toilet seat.

Butt crumbs by coazeau July 29, 2012

butt nigga 

A black man in prison who likes butt pussy

Oh Jkwon? He a butt nigga fasho..walked in on him getting some butt pussy in the showers last night.

butt nigga by CheesyQueef January 3, 2017