Incontrovertibly the most bad-ass nickname on Earth. Usage as a complimentary nickname restricted to males. Can be used as a derogatory insult towards women during bitch fights.

Nickname formed from 2 awesome things.
1) A Grizzly bear.
2) The Beast, from Beauty and the Beast.
Example 1:
"Dude! Dude! Nice throw! You are such a fucking Grizzlibeast."

"OHHHH SHIT MAN! THANKS!"

Example 2 (used as a female insult):
"Heyyyyy girlio so you are like, such a Grizzlibeast."

"FUCK YOU ASHLEY!"
by ihaveaveryverylargepenis April 12, 2009

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