Buttmare 

A terrifying or very unpleasant experience or prospect for a person's anus, usually involving gastric distress and/or poor choices of food ingestion.

"I ate lunch at Town Topic today and it did not result in my customary mid-afternoon BUTTMARE."

Buttmare by afghan_w October 12, 2011

buttmate 

someone who sits behind you in an office or class. They are postioned so that you seldom see their face but who shares an area but try not to touch.

Yo cuz whose your buttmate in class?

buttmate by beaver60 February 3, 2007

Buttmark

The soft folds of toilet paper that you place in between your buttcheeks as you stand up to give a courtesy flush so the cold water doesn't splash your sensitive baby soft skin.

After AV was done blowing the smelly pootinkies out of his garehole, he needed to give a courtesy flush so he placed a buttmark between his cheeks and flushed. His butt didn't get wet or dirty and the bathroom was no longer smelly, everybody wins, except your mom!!

Buttmark by Jordy the Jerk May 1, 2011

buttmagellan 

One who explores the high seas of Uranus.

That buttmagellan needs more seamen on his poop deck.

buttmagellan by Ferdinand Buttmagellan March 18, 2011

Buttbare 

Buttbare means when someone is being rude or inappropriate to you

“She was being very Buttbare last night”

Buttbare by Ebl February 8, 2020

Rainbow Buttmate 

The dude you go to prom with.

'Yo who you going with for prom'
-'oh, josh. We're rainbow buttmates.'

Rainbow Buttmate by 'Filthy Mortal Child' June 10, 2018

buttmarked 

When a faggot marks your ass for the taking.

Your in the pub and a queer laces your drink with rohypnol - you've been 'buttmarked'

buttmarked by silky78 May 16, 2009