Marshmallow T-rex 

When you have sexual intercourse with an obese female with no arms.

Nick ''Hey bro i did the reverse cowgirl with that girl the other day.''
jorje "No way bro i did the Marshmallow T-rex with that one chick that works at the Walking Dead scene"

Marshmallow T-rex by Elborracho_ramirez May 16, 2019

Eat a puss rex

A man known for his prowess at eating pussy…

Gwynn: omg. Did you see. That guy? Shaylynn:. Yeah. No doubt he's an eat A puss Rex!

Eat a puss rex by 4realazitgits March 3, 2021

double-decker peanut butter t-rex 

A rare creature that is created when someone is doing missionary, ties the upper arms of the woman to her sides, fills her mouth with half a jar of peanut butter, and makes passionate love to her until she moans.

Guy 1: Hey man how's the relationship going?
Guy 2: Pretty great, last night we became the mythical double-decker peanut butter t-rex

double-decker peanut butter t-rex by Dankest of Darmens January 25, 2020

Eat like a T. rex 

When you or another person has the appetite comparable of a tyrannosaurus, usually consisting of red meats. Phrase can be rephrased into other sentences.

Daniel: Have you seen John eat? He can eat a whole turkey in one setting!
Chris: yeah, John can Eat like a T. rex!

Eat like a T. rex by LT boi June 15, 2018

pwnasaurus rex 

teh pwnasaurus rex = teh mad 1337 hax-r that pwnz all at everything

Phatty:man you totaly pwned me lu bu
Lu Bu:I know i r teh pwnasaurus rex of ut2k4

pwnasaurus rex by booshels June 5, 2005

Butt-Rex 

Used to describe someone who is acting uncharacteristically "ass-holish".

"Cody's being a real Butt-Rex today."

Butt-Rex by Charles DeMar September 16, 2003

dc rex 

dc is normally a gentle creature which keeps to itself, but after the cocktail a modern day dr.jackel and mr.hide.. the once quiet creature goes on random bursts of rage, smashing things, throwing beer on carpets, falling down stairs and yelling. it has been come to be known as dc rex

if you come in contact with dc rex, run. the cocktail is as follows: 1 bottle of mexican tequilla (with worm), numerous shots of grey goose vodka, and beer.

dc rex by Thomas, Chris July 21, 2006