To admonish with seemingly unwarranted severity, usually expressed with righteous indignation.
a. "I don't care if it's 100 degrees out, you're not leaving this house in JUST a thong."
b. "Yo, why you gotta be beastin'?!"
a. "But, mom..."
by jareda May 17, 2005
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1. Partaking in sexual intercourse
2. To make use of something in a patently fiendish manner
1. Nash and Sarah were beastin' it last night; they call him the magician.

2. Jessica: Where is my Chinese food?
Peter: Oh, I'm beastin' it right now.
Jessica: You drunk-ass fiend!
by Playa N May 25, 2006
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An affliction where the symptom is being a beast.
That guy just knocked that other guy out in one punch! I bet he suffers from beastinitis!
by beastinitis April 19, 2011
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Describes something that is overly cool and/or large.
by faeiette June 1, 2006
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Room mate: Damn dude, you think you were loud enough?

Other Room mate: Sorry dude, I was beastin that shit.
by Alay October 19, 2007
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