Term used by teenage boys when they desperately want to have sex with a very hot looking girl....they just want 5 minutes to put it in, wiggle, and pray to God that they can cum.
Man, that chick is so hot, I'd bunnyfuck the hell out of her!
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi