Top Definition
n. an unordinarily large and hideous female that resembles a manatee, grizzly bear, swamp thing, or any combination of the aforementioned terms.
Rick: What was Claude thinkin' when he brought that broad home with him?
Louie: No kiddin dude! Chick is a fuckin' nightbeast for sure!
by Claude Bonet September 05, 2006

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