One who is boorish, thoughtless, unsophisticated and ill-mannered. So ill-mannered, in fact, that they lack the courtesy to wait for an available urinal or commode, and instead elect to micturate in the fucking sink.
Christ, who invited that sinkpisser to the party? Last time he came here, he ate all the buffalo wings and wiped his hands on the curtains, right after he put his cigarette out on the cat.
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