Flex rex

When a guy flexes his dick to make it bigger.

yo did you hear about Dave pulling a flex Rex

by Camoflame88 May 27, 2016

T-Rex Arm

A symptom after getting the Covid Vaccine.

I got my covid vaccine yesterday and I cant lift my arm high. Totally have T-Rex arm

by Killrek May 11, 2021

The T-REX

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

Crackadilian-Rex

Aggressive crackhead behavior.

Like a cat on catnip, running around the house chasing and biting people, acting like a Crackadilian-Rex

by Emperor Black Mist March 1, 2023

Spastic T-rex

When your getting a blowy and you nut and they keep going and your arms go flailing and you make noises that sound like a retarded T-rex

Bro I was getting some sloppy last night and she made me do a spastic T-rex shit was insane

by Confused_Cephalopod June 25, 2025

Rex

A very greedy, selfish brat. He is a hypocrite and likes to beg for money. He makes up excuses for why he does not have money. He always wants you to buy stuff for him or asks you how much you have every day. He is a sad person with no life.

Some kid keeps asking me how much money I have!
It was probably Rex.

by A9172 October 14, 2019

Spermasaurus Rex

When someone who, after reserving an OG-Mudbone amount of schpunk for an extended period of time, releases his "seed" with such ferosity that he lets out a roar of relief and the meanest, biggest load ever (basically cums a water bottle or 5). It ejaculates with speed and power, and no condom can hold it back. It is the Spermasourus Rex, the true ruler of the Animal Kingdom.

"Yo dude! How'd it go last night?"

"Man, i was a freaking Spermasaurus Rex! It was the mega load! It even tore the condom, and she just drowned in it!"

by YacobEnterprizes April 2, 2014