1 definition by pissed off exgirlfriend

Top Definition

When you munch on someone's butt then eats someone else therefore being a cheater!

Girl 1: Why did you break up with him?

Girl 2:Well we did it and he was a buttmuncher, but then his "business trip" was to be a buttmunchereatercheater.

Girl 1: :0

by pissed off exgirlfriend May 22, 2011

Buy a buttmunchereatercheater mug!