A person, who is socially awkward, posh and arrives on there first day of a new school with a briefcase or they own a briefcase.
Bully: Briefcase Wanker
Briefcase Wanker: Ah yes, the bully of the school, your next jokes about me losing my virginity, well I lost it last night, ask your sister.
Bully: I don't have a sister
Briefcase Wanker: You will in Nine Months.
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