Within prefix origins ´´Puño´´, means ´´fist´´. The word has evolved with some imagination to refer to jerking off, with a fist motion of course. However, these words have lots of meanings depending on the context. Often it can be used as an adjective defining someone who complains alot or betrays you. Its use could be as simple as defining something as annoying.
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