A supposed act of necrophylic sex in which a person digs up a dead woman and performs cunnilingus on the body while another person (the mung-jumper) jumps off a ladder or other high object, landing on the stomach of the corpse.
You and Carl went mungfishing? You're fucking sick. I hope the cops bust you.
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