1. In sports...someone very beast-like. A very good player. A big, massive player. Someone that you don't want to mess with. Usually a defensive lineman.
2. To deisel meister someone is to run them over (football) or dunk on someone (basketball).
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