(adjective) 1. used as expletives; th'fuck is wrong? 2. expletives used informally as intensifiers; who in th'fuck are you; (th'fuck is going on); (what th'fuck is up).
Th'fuck was on your mind when u decided to rob the bank Alice!?
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