Using a water activated growing dinosaur as a tampon then smacking someone with it once it's fully grown and filled with blood
My boyfriend gave me attitude so I gave him a Bloody T-Rex.
by Xanthern August 7, 2018
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A slang term for the male penis
Joe: Yo I heard that Seth got quite the Pet T-Rex

Bill: Nah his dick is small for his size
by xGreen January 15, 2020
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something that is done where both arms are bent upwards to the face to show the appearance of short arms; most people experience this around weirdos or during sex.
I accidentally did the T-Rex last night when i was with Sandra.
by huuurbigggurrrrd October 9, 2017
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A sexual act where the girls hands are at the bottom of the dick ,and the guy grabs her head and pushes it down on his dick repeatedly making her gag.
Dude my girlfriend gave me a T-Rex job last night.
by Sexguide January 9, 2018
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When you are so drunk that your knees fall into to the teepee position (imagine a giraffe trying to drink water spastically). Your arms then tuck into your body and you assume the T-Rex position as you gobble along on the dance floor.
I think I just saw a dinosaur on the dance floor... the bloke must be in T-Rex mode
by Dogshitsomething December 7, 2017
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Refers to a very large penis.
I want that T-rex to devour me.

You’re just more prey for the T-rex.
by BobTheGod515 January 19, 2023
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A house pet that is extremely loyal to its owner. It has four legs and can differ in color. It is totally not called a dog.
T-rexes are mans best friend
by ser see swee February 4, 2021
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