Guanasaurus Rex 

Is a kind and loveable asian dinosaur, often referred to as a G-Rex

Look at the nice Guanasaurus Rex.

Guanasaurus Rex by G-Rex the Asian101 October 10, 2013

Ganjasaurus Rex 

When the Marijuana being smoked is unbelievably loud, and makes you monstrous in bed.

Person 1: Dude, how was boning Bridget last night?
Person 2: Bromigo, it was fantastic. I burned some of that OG Pineapple Express before,

and I plowed her like a fuckin Ganjasaurus Rex.
Person 1: Rad.

Ganjasaurus Rex by SammieJ. January 13, 2014

Guineasaurus Rex

A guineasaurus rex is an off the boat italian american, or a guido. They usually have sex promiscuously with multiple partners in college. They enjoy saying things like "fucking skanks" and "Jaeger Bombs!" while pointing around the room.

Mike is a huge guineasaurus rex, no matter what you say.

Guineasaurus Rex by Cal Hacker March 3, 2009

gumpasaurus rex 

the words gump and tyrannosaurus rex put together. to be gumpy means to look stupid or really goofy or lame. a tyrannosaurus rex is the gumpiest dinosaur ever. so when you call someone a gumpasaurus rex you are saying that they are far beyond being gumpy.

mike: look at josh over there, hes such a weirdo.
sam: wow he looks really goofy, call him over here.
mike: hey you, gumpasaurus rex, come over here!

gumpasaurus rex by aimeeleetradmark May 9, 2008