A boy who is, weird, boring, stupid, gross, ugly, has no friends, can't get a girl to have sex with him, thinks he's awesome when he's really just a loser, gets drunk a lot, is poor, his family hates him, he is a nobody.
Girl: eww! Look at that boy! He's such a bumbucket!
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