Paradoxasaur 

From Demetri Martin's comedy.

A magical make-believe creature that only exists if you do not believe in it, and if you believe in it it doesn't exist.

"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 AggiePerspective July 5, 2008

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