2) (adj.) Of or having the quality or flavor of the Beastie Boys lyrics, humor, or style (i.e. having sarcastic or biting humor, a flippant attitude, use of obscure cultural references, quoting or wearing kitschy and outlandish phrases or styles).
Derek got all beastie and saved his head like MCA.
Qwame gets all beastie when he drinks Brass Monkey 'cuz he gets retarded and up peoples faces.
"Of course! You're my beastie!" Karen replies.