An individual who has always been enthusiastic about any activity or opportunity that comes his or her way. These priceless individuals have been around since the Mesozoic era and are known to have a few descendants in South Auckland, NZ.
Sam - "Look at that guy ! He is not from around here is he?"
Bob - "Judging by his behavior, I reckon he is a keen-a-saurus rex"
Sam - "No Way ! You mean a rare descendant of keen?
Bob - "Yeah ! Let's go meet him."
by Dr. Keen October 24, 2011
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A loud, overly dramatic, annoying, attention-whore that was destined to live life alone and never bare children. Thus, extincting their own gene-pool.
A-"Hey, you look tired today"
B-"Yeah, the 'attention-o-saurus' kept me up all night when she was yelling at some guy she just met because he doesn't love her."
A-"Thats ok. At least she will never have children."
by LitlatP March 7, 2010
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A vagina that seems bad-ass but in actuality, it just scavenges for sloppy seconds.
I was so drunk I almost got devoured by a vagina-saurus-rex. Thankfully, she was distracted by the guy twitching in the corner.
by DP Michigan October 20, 2010
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A person with a nose that is not in proportion with their face. Often leads to abuse from friends and embarrassing photos from the side.
Woh check that fat man scoop Bain he's such a rhino-saurus rex
by Kingc1utch November 13, 2009
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A type of dinosaur from the Jurassic period that often received anal sex from every other dinosaur in the immediate vicinity.
It was often taboo back in those days as there was a disease known as DAIDS, or dino-AIDS. It is rumored to be the cause of the dinosaur extinction, even more so than an ice age.
Oh my GOD! Littlefoot! Stop receiving anal sex from that sharptooth! You don't want to be known as a Butt-Sex-A-Saurus, do you?
by InSilverFlames May 12, 2008
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A man possessing a penis so large it causes internal bleeding, vaginal and anal lacerations, pelvic crushing, ruined sheets, shattered dreams of motherhood, and permently leaves a woman smiling funny.
Jenny: Do you know what blood-type Beth is?
Vicky: No, why?
Jenny: I heard Josh fed her the dong-a-saurus rex and now she needs a transfusion.
by pumpkin escobar October 21, 2005
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