what a man might call himself under the following conditions; a) he is trying to convince his mother that he isn't gay, but is a porno actor under that name, b) he is trying to convince his girlfriend that he is gay, so they can break up (only she doesn't believe him, hence he tries to turn her off by telling her that he is a porno actor under that name)
A combination of bare assed and buck naked. Another form is buck ass nekkid. Usually applies to a drunk frat boy types in innocent homo-erotic situations while hard drinking with their buddies.