When a guy is sitting in class and gets an unexpected/unreasoned boner. After class is through, they need to stick out thier ass while walking in order to hide it. The apperiance is similar to that of a prehistoric Tyrannosaurus rex.
Matt: Did you see that Zach kid T-Rexing out of class!?
Keith: Yea man it was so obvious.
by Plug1990 April 18, 2011
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1. Dinosaur who was considered to be the most ferocious and dangerous. Has huge teeth and mouth and can eat anything.

2. Nickname for Fibert Bruce, a man who has the physical appearance of a dinosaur, with huge teeth and a big mouth. Has been known to eat anything in sight.
"Damn... T-Rex ate all the pizza crust we left out last night. What a fucking scavenger!"
by kilo May 30, 2003
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The act of a girl taking it in the ass and while she's riding she's making obnoxious dinosaur noises while making her arms look like a trex
Jeff and Leah were trying the T-Rex one night and all I could hear was loud raptor like noises
by Darnelloo June 6, 2016
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An individual who gives 0 fucks about another ones feelings. This individual will never been seen sad, and always be seen with a beer. This individual can be the goofiest and also the craziest MF you’ve met. Intoxication is a T-Rex’s best friend.
I’m a T-Rex, OUUUUUGHOOOOHHHH 3|6|7|3| : |19|
by Abooga booga October 29, 2019
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Just like a T-Rex, you eat/devour your girl without using your hands. Bonus points for growling and screaming
Her - I want you to go down on me tonight
Me - Oh I’ll T-Rex you baby
by HornyLesbian8 October 25, 2020
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T-Rex is an adjective. One whose arms are in far greater demeanor than the body. A disproportionate person in the long run. One who walks funny and is very long.
Have you seen that kid AJ! He looks like a freaking T-Rex!
by DontWorryAbout It May 6, 2008
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Wow
Was that
Your famous
Tyrannotaurus Rex
?
Because my father often put me down as a child, really hurting me with comments, I never forgot, I guess later in life I watched out for partners, crushes who had similar traits. Who either ignored me, made fun of me or told me really nasty shit. Maybe it felt homely, familiar but wrong nevertheless. I didnt understand it until recently. Self worth does not exclusively but partially maybe mainly stem from your upbringing. Sometimes its your job to rebuild it. 🖤
(T-Rex)
by Krkič April 11, 2019
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