methasaurus 

A very large person who is addicted to, and constantly taking large doses of, meth.

"Yo! Look at that crackhead."

"Yeah she's a methasaurus!"

methasaurus by 69asaurus April 15, 2017

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

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

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

mathasaurus rex 

one who likes to shriek and growl when sexually excited by math problems, sometimes waving their arms in a dinosaur-like fashion.

when jimmy began to grunt as he started the math test, there was no doubt he was a mathasaurus rex.

mathasaurus rex by winerschnitzal111 June 9, 2010

Manthasaurus Rex 

An very old gay man (70+) who is on the prowl for younger gay men (20-50) in the hopes of bedding them in exchange for lots of free drinks, food, and attention. Flashes Ben Franklins and wears an expensive watch and ring.

Well, tonight is totally dead, except for that Manthasaurus Rex in the corner gawking at you.

Manthasaurus Rex by silverdoggy March 31, 2012

Meatasaurus 

The Way People Call A Carnivore If Unknowing to the Scientific Phrase

Is It a Meatasaurus?

Meatasaurus by NerdyNugget October 13, 2020