Beast is an adj to descibe a noun that is thought to be cool, really good, awsome ect.

Different forms are

Beastin'-something your doing
Beastly- another form to describe how something is done.
"Dude, that shirt is beast! Where did you get it?"
or
"Wow Kristina, your such a beast for being so beastly."
by Sarashayne December 26, 2009
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when you are a beast at halo 3 and you no scope someone in the face.
tommy, i just beasted on that guys face.
by the pussyman aka the fister January 2, 2010
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A monstrous animal that lerks and presents fear into the hearts of the unsuspecting victims he so effectively rapes and murders.
by Eric Beast Sather December 12, 2003
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the action in which two individuals mate, mainly occuring after a long night drinking..
after the party last night me and my girl beasted all night long.
by Baby G-zus January 17, 2006
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Beast: Some one who is sooo amazingly cool they are called a beast. Or they are good at something.
"Jessica Doyle is a beast"
"Austin Mahone is a beast at singing."
by imma beast February 15, 2012
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