When a sick redkneck shoots his "game" pulls his penis out and fuck it in the butt, after this gutting the "game" pulling out the heart and inserting his dick in the heart at a rapid pace untill it is ripped in half. Thus the rusty gamehead.
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