Seemingly derogatory term but often used with affection. In the classic sitcom Malcolm in the Middle, the brothers call each other buttmunch but with a smile and a pat on the back. The word can also be used as a sexually suggestive term, using it on someone you would actually like to munch on your butt.
1. Reese to Malcolm: Way to go buttmunch! I'm proud of you!
2. Reese to Malcolm (pulling down his pants): Hey buttmunch, dive in!
by zekebones March 17, 2018
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N. An annoying person who you can't stand. Someone you can't find a word for.
"Dude, stop being a Buttmunch!!"

"Don't talk to me! You're such a Buttmunch"
by IhYfF July 2, 2009
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Buttmunch is a common insult used to describe someone with a disagreeable personality. Character traits that can define a person worthy of being called a buttmunch include but are not limited to: annoying, mean, dumb, sarcastic, etc.
No ones knows were the term was originally coined before it was used in Beavis and Butthead, which brought the word to mass popularity.
Haley: Blah Blah *annoying* blah blah blah

Daniel: Haley! Stop being such a buttmunch!!!!
by Sakari October 30, 2012
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someone who is a complete ass face, and has an inexplicably large head. also finds it amusing to laugh at the expense of others, and is renound for being irritating.
by xandi April 1, 2008
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A name you call someone when they do something wrong, or something doesn't go your way.
You Buttmunch, you didn't come to my lunch!
by Pregnant Ninja March 13, 2010
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