Accosted by a stranger and then anally raped.
He was coming home from the party when two people jumped out of the bushes and buttmugged him.
by wankpanda November 17, 2008
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a really gumpy person similar to a derp, but twice as ugly with out having to be caught in the act of making a ridiculous face
Jake: "Dude, did you see that guy back there"

Eric: "Yeah dude, what a buttmug"

Jake: "Yeah, what an ass canister!"
by frare May 30, 2011
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