Top Definition
To be "Justin Bieber-ed" Is when you have sex with someone anally and pull out and swipe feces across their forehead to form a "brown bang" like the ever popular Justin Bieber haircut
How did you feel about your sisters new hair-do after I Justin Beiber-ed her?

There was one less lonely girl after I Justin Bieber-ed my girl friend.
by aera lee November 28, 2010

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