1. A large carnivorous Dinosaur.
2. A three wheeled concept car.
3. A very good band from the early to mid 70s. Previously Tyrannosaurus Rex. Led by singer/songwriter, Marc Bolan.
3a; If you're from England: The band that was "bigger than the beatles" (as quoted by Paul McCartney and Ringo Starr) and had lots of hit songs, starting the "Glam" genre.
3b; If you're from America: That one band that did "Bang A Gong (Get it on)".
1. T. Rex is almost unknown in the U.S.
2. You know, T. Rex, the band that Oasis ripped off on "Cigarettes & Alcohol".
by That one kid, jeff August 3, 2007
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When you are doing a girl from behind, preferably close to the edge of the bed, and you grab her by the shoulders and lift her up. This results in her swinging her arms aimlessly like a T-Rex while making moaning noises.
"Dude.. what was all that noise.."
"Oo.. I t rexed that bitch"
"Sahweet"

by runner_steve February 18, 2008
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A condition that is caused by heavily drinking alcohol.

Symptoms:
-Your arms curl up as your fingers point outwards as if you were a retarded T-Rex dinosaur.
- Staring off into oblivion
- unable to speak a clear modern language

This condition was made famous by a man named Pat Brister from the small mountain town of Granite Falls, Washington.
"Pat has had too much to drink tonight, he's already T-Rexing!"
by Danathan Burton October 13, 2008
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A man with freakishly humongous muscles and tiny forearms.
That T-Rex hasn't heard of curls!
by miaisbored November 8, 2010
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When your standing around with either one or both elbows tucked into your side, arms straight, wrist and fingers curled down to the floor.
Lily was standing in the kitchen talking to her mother, unaware that she was T-Rexing with both arms.
by PNPBOI October 18, 2015
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A cheap ass. The person, who at dinner in a restaraunt when its tip time, whos arms seem to be too short to reach into their wallet and tip their fair share. T rexes, frequently seen reusing napkins and relying heavily on the "if its yellow, let it mellow" flushing principal, are the utmost cheapest, tight waded, penny pinching bastards around.
Frank: "Steve, how much did you tip?"

Steve: "I dont believe in tipping... *leaves table*"

Frank: "You god damn t rex... *shells out more cash*"
by Johnathan Milavec March 5, 2007
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When you get so drunk that you become retarded and you tuck you elbows into your side and still try to use you hands, but they are short and useless, just like a T-Rex. This state of drunkeness my also be accompanied by slurred yelling that sounds like a roar. Getting this drunk usually involves blacking out and falling down.
Keven got so drunk last night he started T-Rexing.
by FreqHopMaster March 11, 2009
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