Top Definition
A vagina that attacks you when you go near it
by Anonymous March 31, 2003

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A carnivorous prehistoric creature that primarily fed on the smaller penisaurus.

A sore on the vagina.
A. The vaginasaur was a fierce carnivore that lived during the jurrassic period.

B. Man, that bitch had a vaginasaur.
by robistotle October 02, 2009

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The genitalia of an older woman or cougar.
Dude, that guy is always going after the cougars.

Yeah, he's hunting Vaginasaurs.
by Knight hawk March 19, 2009

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Noun, Synonym for cougar an older women flirting with younger men or just generally doing things she is to old for.
Gross, that vaginasaur's middrift is showing off her C-section scar.
by Queeseso August 24, 2010

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Large, old, leather skin woman
Mrs. Wilson is a cranky Vaginasaurus
by HankScorpio January 25, 2006

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An old broad, generally dressed up.
Check out that scraggly old vaginasaur over by the bar. I bet Ed Greco would do her!
by Roberto Costapoopoo March 31, 2003

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To be a major cunt. Usually used as an insult to another person. Usually to a woman.
Girl 1: "Oh my God, Catline was being such a vaginasaur today."

Girl 2: "Oh she totally was!"
by LunartheLycan May 16, 2009

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