Named after the notorious Marvel Comics supervillain, kingpinning is the act of methodically leveraging observations and social interactions for personal gain.
Benjamin Linus from LOST was a master of kingpinning; he could find out what a person was emotionally invested in and exploit it.
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