|1.||buck ass naked|
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.
Josh: "Hey, that Chad guy is buck ass naked and sportin' a semi."
Jake: "Yep, he's a nudie."
Jeremy: (as he drops his boxers) "Yeah, he'll nude up any time, anywhere."