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Paradoxasaur 

A creature that, if you believe in it, it exists. If you believe it doesn not exist, then it exists.
"Hello I am a twenty one year old 120 pound virgin with c-sized breasts who does not have a boyfriend and is not crazy." -The words of a paradoxasaur.
Paradoxasaur by allatropic February 10, 2007

paradoxataur 

This is a mythical creature that has mystified scientists for years. It only exists if you believe it doesn't exist, and vice versa.
paradoxataur: hi I'm a smart blond who doesn't have a boyfriend and isn't crazy.
paradoxataur by Nick brewer April 23, 2008

Paradoxotaur 

Paradoxotaur:
Mysterious creature that is said to exist only if you don’t believe in it. But, if you do believe it exists, then it doesn’t. Tends to haunt students of logic and babies. Form unknown.
friend: i think i saw a Paradoxotaur yesterday

me:no you didnt, if you believed in it, then it doesnt exist. i can see it because i dont believe in it
Paradoxotaur by rockdablok March 2, 2007

Paradoxosaur

Mysterious creature that is said to exist only if you don’t believe in it. But, if you do believe it exists, then it doesn’t. Tends to haunt students of logic and babies. A different take on the Paradoxotaur.
Her: OMG! It's a Paradoxosaur!
Me: That means there isn't!
Paradoxosaur by bamx January 11, 2009

paradoxotaur 

Mysterious creature that is said to exist only if you do not believe in it. But, if you do believe it exists than it doesn't. Tends to haunt students of logic and babies. Form unknown.
The scientists were baffled as to what the paradoxotaur could look like.
paradoxotaur by Neoshadow November 15, 2007
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
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