Boneboy Share definition Flag A dude who fucks other guys regularly. Two or more guys who fuck are called boneboys. Person 1: Did you hear that Mikey and Nick went to a gay bar last week? Person 2: Yeah, they must be boneboys. Boneboy by wh y January 10, 2018 0 0 Get merch Get the Boneboy mug. Buy Now — $32.95 See more merch