When a woman's vagina is so big and loose from fucking people a lot that it could almost eat someone.
Damn dude! I was gonna fuck her and I was like, "Woah! Cuntasaurus Rex get the hell away from me"
by The Sheep September 9, 2004
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This motherfucker is the queen of the cunts. she is pure evil steer clear of her you never know she might be your own mother. if she existed during the time of dinosaurs she more than likely would have survived extinction.
Your mom is the biggest Cuntasaurus Rex I have ever met in my life, Steven.
by hawtie45672 November 16, 2018
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A large and or scary looking woman who is rude, or "cunt-like" in nature
Yeah, she is pretty much a cuntasaurus rex for saying that to him.

That girl mean! Like a cuntasaurus rex
by npizzle March 9, 2009
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A very bitchy person, good to use for a laugh, or to make fun of someone, and not get in trouble, because technically, it doesn't exist. Also, a Dinosaur living in your mothers vagina. If it's not pink, he/she (GOD I HOPE ITS A SHE) will eat the human.
Austin Bowes. 'Nuff said.
"GOD! WHY DO YOU HAVE TO BE A CUNTASAURUS REX?!"

"RAW RAW RAW RAW RAW RAW RAW!" "STOP BEING A CUNTASAURUS REX AND SAY SOMETHING ELSE!"
by John Johnston/ Artemis Flame January 4, 2009
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A word originating from the Aborigine tribes of Western Samoa, it is now commonly used at high powered business meetings in the Maltese capital of Valetta
That American over there is a Cuntasaurus
by Adam February 20, 2005
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When a woman is being overly cunt-y. Usually the few days premenstrual.
Woman: "Don't even go there with me"
Other: "Ew, you're being a Cuntasaurus Rex right now".
by Ltotheizzay March 4, 2009
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