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1) (v.) To act crazy, outlandish, outrageous, stupid or retarded.

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).
Yo, dawg, dem lyrics is Beastie, yo!

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.
by Tenacious Faulker March 29, 2009
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Sep 6 Word of the Day
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Damn that was a steezy ass kickflip son!
by niggaliciouszor April 29, 2007
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Scottish word for a small animal such as a mouse or an insect.
Jings! Whit was that?

It was a wee beastie!
by MEAT PIE!!!!!!! August 17, 2008
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Stands for: Boys Entering Anarchistic State Towards Internal Excellence

From the Beastie Boys
No Example Needed, Buddy.
by YWouldUDoThis May 01, 2005
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Someone who is really cool, or an absolute beast. Someone who is really good at something. "A legend"
Can be spelt beasty
Also used as beasty boy.
John's an absolute beastie.

He's a beast at football.
by drpecki December 24, 2006
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term used for best friend or groupie who really catches your eyes. lovable people you want to hang with,; someone you pig out and sleep over with. Someone who you share secrets and winks with
"Hey, you wanna go to my house?," says Annie.
"Of course! You're my beastie!" Karen replies.
by aznblonde3636 November 03, 2007
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