The Rex Ryan 

when you dress up as your brother and fuck his girlfriend.

Tom- How did you get with your brother's girlfriend melanie?

John- Simple, I pulled The Rex Ryan.

The Rex Ryan by Dorothy Babson November 28, 2010

rex the runt 

A classical animated British comedy. Rex the Runt - "The Wobbly Bobbly, Wibbly Squibbly Dog" by Richard Golezsowski

"Did you watch Rex the Runt last night?"

rex the runt by Kane April 7, 2005

doing the T-Rex 

puking so extremely loudly as to sound like a T-Rex, usually as a result of excessive alcohol consumption

Sarah: "Where's Jake at?"
Jordan: "He just downed his 10th shot of tequila, and now he's in the bathroom doing the T-Rex."
Jake: "RRRRRRRRRRRRROOOOOOOOOOOOOOAAAAAAAAAAAAARRRRRRRRRRRRRRRR!!!!!!!!!!!!!!"

doing the T-Rex by Earl Mooner February 17, 2009

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.

The T-REX by huuurbigggurrrrd October 9, 2017

The Filthy Rex Hunt 

When you get paid to drive Loopy Cunts around, but you just use your job to Prowl Public Lavatories for Rough AF anal fisting.

G'day Bob, word is that you've been doing "The Filthy Rex Hunt" 🤔🤔🤔

The Filthy Rex Hunt by Facial Freddy May 1, 2023

tony_the_t.rex 

A Tyrannosaurus rex who screams so loud it breaks the sound barrier

Hey I’m gonna go tony_the_t.rex my vocal cords away

tony_the_t.rex by Tony the t rex July 18, 2021

the x-rated rex

a new threesome sex prank for M/W/M. Once the girl falls asleep, each guy ejaculates into an armpit. This will stick her arms to her body, leaving her to wake up with T-rex arms

Guy1: Yo, last was night was KILLAH dude!
Guy2: Hell yea...the x-rated rex we gave that chick was funny as shit
Guy1: shh shh...she's wakin up now

the x-rated rex by McGrundles October 31, 2011