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1.
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
 
2.
Unsolicited penis to butt touching
I was butt-mugged by this guy squeezing by me on the subway...it was weird.
by JSG0031 June 02, 2010