Top Definition
a large hairy vagina.
look at that hair coming out of maddies bikini. she is one hell of a twatasaurus rex.
by chris lucas April 09, 2006
2 more definitions
1. A female sexual predator.
A female exhibiting vile, offensive and inappropriate sexual behavior.

"That twatasaurus rex tried to take my boyfriend home while I was in the bathroom".
by Maura Greene November 06, 2006
a twat with a large bushel of hair in tight pants!
Ruben is such a twatasaurus rex!
by ditto55 July 13, 2007

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