a-rex 

Slang for Anorexia Nervosia. Used mainly as an insult for friends who believe they are fat and opt to not buy/eat food.

"Thomas, what are you ordering?"
"Meh. I think I'll get a cruton"
"WTF mate? A cruton? what are you a fatass?"
"Don't call me fat!"
"You are fat you A-rex son of a biotch"

a-rex by David A. Sherman March 28, 2008

A Rex 

It has short stubby arms with a big round belly. Instead of a roar it has the vocabulary of the word um. It is narcissistic, bipolar, money hungry, an extreme slob, and has bad breath

Did you see the A-Rex coming into work today acting completely looney?

A Rex is a type of person

A Rex by Mc Maze October 11, 2025

jug-a-saurus-rex 

a girl with hugs tits.

whooaaa, look at that jug-a-saurus-rex!

jug-a-saurus-rex by bloomiish July 14, 2009

Keen-a-saurus Rex 

An individual who has always been enthusiastic about any activity or opportunity that comes his or her way. These priceless individuals have been around since the Mesozoic era and are known to have a few descendants in South Auckland, NZ.

Sam - "Look at that guy ! He is not from around here is he?"
Bob - "Judging by his behavior, I reckon he is a keen-a-saurus rex"
Sam - "No Way ! You mean a rare descendant of keen?
Bob - "Yeah ! Let's go meet him."

Keen-a-saurus Rex by Dr. Keen October 24, 2011

ass-a-sauras rex 

a giant bowel movement

You should have seen the ass-a-sauras rex I left in the toilet this morning after all the Indian food I ate last night at 4am. It required 3 flushes and a call to a plumber.

ass-a-sauras rex by krunk94 April 1, 2008

dong-a-saurus rex 

A man possessing a penis so large it causes internal bleeding, vaginal and anal lacerations, pelvic crushing, ruined sheets, shattered dreams of motherhood, and permently leaves a woman smiling funny.

Jenny: Do you know what blood-type Beth is?
Vicky: No, why?
Jenny: I heard Josh fed her the dong-a-saurus rex and now she needs a transfusion.

dong-a-saurus rex by pumpkin escobar October 23, 2005

Fap-a-saurus Rex 

This is another usage of the word "fap", which means to masturbate. There are three distinct levels of fapping and Fap-a-saurus Rex is the most extreme. It is someone who masturbates constantly, during every waking and non-waking moment. This is a person whose hand you never want to shake. This is the type of person who does not eat, shower, or sleep, because it takes them away from fapping.

Joe Schmoe: "Dude, have you seen Bill recently?"
Tim Fuckis: "Yeah about three weeks ago. That's when he became a Fap-a-saurus Rex."
Joe Schmoe: "Damn, so that means he does nothing but fap? Not even eat or sleep? And I thought I was bad being a Fap Master"

Fap-a-saurus Rex by Dash Random October 27, 2010