t-rex syndrome 

Happens when a person running (note: not a runner) runs with their arms tucked into their armpits and forgets to swing them in stride. Their arms look tiny and they look like a big goofy T-Rex.

Wow, that poor guy clomped by with t-rex syndrome. I could hear him from the other side of the street.

t-rex syndrome by metalpizza July 10, 2006

T-Rex Driver 

When some who holds the steering wheel of their car so close to their bodies that their arm position resembles that of a Tyrannosaurus' puny arms.

My grandma is a real T-Rex Driver, the only thing missing is for her to try to eat Little Foot.

T-Rex Driver by King Dar January 7, 2010

t-rex legs 

Extremely beefy and muscular legs, the opposite of chicken legs.

People say I skip leg day, but look at these t-rex legs!

t-rex legs by ThereAren'tAnyNamesLeft January 15, 2018

T-Rex dick

When a really big guy has a large cock, but it looks small due to his over-all size, much like T-Rex's arms.

My cock is seven inches, but I'm 6'7", so it looks kinda dinky. I have a T-Rex dick.

T-Rex dick by Alex Stockwell April 23, 2008

T-Rex Defense

If an awkward girl won't leave you alone, make like Ian Malcolm and stop whatever conversation you were having to freeze like a statue. Her vision is based on movement and she will pass you by for tastier prey, like a T-Rex.

"Kelly from the bar came up to me last night and I couldn't shake her off, I had to utilize the T-Rex Defense in hopes she would move on and attack some lawyer guy on a toilet."

T-Rex Defense by Phil Hubbard September 13, 2008

T- Rex Handshake 

Whilst giving a hand Job the girl puts her elbows into the sleeves of her t-shirt/Top, giving the impression of T-Rex arms

Dude 1: My girlfriend gave me a T- Rex Handshake last night.
Dude 2: She's a keeper

T- Rex Handshake by Ghandi179 April 12, 2013

T-rex hand 

A serverely deformed hand and wrist which in turn resembles that of a tyrannosaurus rex. There cannot be more than three fingers and one thumb. It is most deadly when the host is an otherwise hot chick. Beware.

"Man, that girl was all up on me and then I saw the T-rex hand and I had to get the fuck out."

T-rex hand by JimmyJack August 26, 2006