Mediasaurus Rex 

Someone who knows so much about movies, television and music that they are a monster

I'm borrowing some unheard of movies from Joe, he's a real Mediasaurus Rex

Mediasaurus Rex by FrankoBastid February 16, 2010

Methasaurus Rex 

term given to sketchy meth-heads in or around a city

Its about 10 til, we are driving to Carl's Jr. And we see a Methasaurus Rex, barefooted as fuck! Welcome to Redding, CA.

Methasaurus Rex by ericd000e August 31, 2010

mermasaurus rex 

A mermasaurus rex is a mythical creature designed by 2 of the earth's most intelligent minds, Blake and Angela. It is half mermaid and half t-rex. the upper half is that of a beastly tyranosaurus rex and the lower half is a mermaid tail. The mermasaurus lives alone on remote islands around the world usually laying out in the sun, listening to boy George, doing the crossword puzzles in the New York times, chain smoking and swearing like a sailor. They can only be seen by those with an open mind or children. If you happen to be one of the lucky few who get to meet one you will likely receive a golden coin with an image of boy George on it from them. Be polite and don't act afraid or they will eat you in one bite.

The mermasaurus rex loves to sunbathe on the island.

mermasaurus rex by angeladustine77 August 22, 2019

Methasaurus Rex 

A meth user that has gone zombie from using too much meth for too long and who no longer needs food or sleep because they run on amphetamines and nuclear brain fuel.

The Methasaurus Rex went berserk when the drug dealer told them there were no drugs and ripped the fender off the dealer's car.

Methasaurus Rex by Jamiesaurus March 11, 2021