A male homosexual's anal opening; a word made from the two words "butthole" and "pussy". Used mostly as slang by afforementioned group while discusssing lascivious or trampy behaviour by other male homosexuals.
When a man in prison bends another man over and squeezes the bottom of his buttcheeks and tante to create a makeshift vagina, that can now be used for penetration while allowing his scrotum to hang free and be available for third-party stimulation.