A very painful insult to inflict on someone. If someone calls you a buttass you know your a loser with no friends.
I cant believe jarad called him a buttass.
by Asmith32 January 19, 2007
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A name to explain what a stinky person's room smells like, or even how to explain how the person smells. (perhaps someone who wears no deoderant) Even sometimes used to explain a pig or donkey's stench.
Actual Example with dif. names:

Chris: EWW! it smells like buttass in here! where's the Lysol????!!?!?!
Bob: In the bathroom!!!
by Wiccanpyroangel666 June 24, 2007
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To describe a nasty ass taste.
Dude this Rockstar tastes like buttass!!
by cool cool. April 13, 2010
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To become completely dominated, overwhelmed, screwed or owned by someone or something. This is typically used to describe the outcome of competitions.
He was completely buttassed in that last game of Quake 3. He played like a total noob! Perhaps he should stick to the beginner level.
by Sarge! December 18, 2009
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Someone who would be dumber than the ass of a butt, but since an butt can't have an ass, the person who is buttass stupid is in fact the biggest idiot alive.
You're so buttass stupid that you just tried to feed your fish Flammin' Hot Cheetos.
by farfellseed February 13, 2009
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A guy who has no soul, is a serial liar and fake. Short pathetic excuse for a human being.
Jeremy is a buttass for running away like that....
by VIOLET666MOON April 20, 2019
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My buttass ain't goin' in no CV harmacy.

or

My buttass don't want no clean chai cause I'm a dirty girl.
by emkat09 November 24, 2020
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