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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
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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

jug-a-saurus-rex 

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 

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.

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
More from Urban Dictionary

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
Literally "dirty" pronounced with a West Indian accent. Can also have a positive connotation, for example Sean Paul's album title "Dutty Rock".
"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
Word of the Day on October 1, 2026
korean word for madam, older woman
Ajumma wait a moment
Ajumma by aintnotinbutnice July 5, 2009
Word of the Day on September 30, 2026
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