One who is known to munch on the faces of butts, or an individual so irritating that you're almost positive that they munch on the faces of butts. See also: Ass hat.
Man, Carrot Top...what a butt face muncher.
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A rim job finished off by giving a raspberry.
I walked into the bathroom and heard the end of a monkey faced butt muncher. I want to cut off my ears.
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