Grimnasaurus 

A massive grim swamp donkey.

Michael lost all respect among his friends and co-workers after he woke up next to a Grimnasaurus after a night of heavy partying and considered pulling the coyote move.

Grimnasaurus by Tricky Disco April 28, 2009

grumpasaurus 

a grumpy person. may or may express said grumpiness with non-human like grunts and sounds. definitely pouty and brooding.

An unexpected snowstorm in April turned Graham from a happy, human boy into a decidedly brooding grumpasaurus.

grumpasaurus by Siducci December 24, 2008

grumpasaurus rex

One who is dour on a colossal scale.

Person 1: "What's wrong with Bill today?"
Person 2: " He lost his wallet this morning and all afternoon he was nothing but a Grumpasaurus Rex to everyone in accounting."

grumpasaurus rex by bmyoung November 25, 2013

Grumpasaurus 

When someone gets tired and extremely grumpy

Why are you so grumpy right now?

"im tired"

no your being a grumpasaurus!

Grumpasaurus by tc61 May 14, 2011

grumpasaurus 

A dinosaur that is exceptionally grumpy, this term can be used to describe a woman when she is grumpy especially if she also looks like a dinosaur

guy#1- omg susie was in such a mood today.
guy#2- yeh and she is so fucking ugly
guy#1- what a grumpasaurus

grumpasaurus by gapppo June 10, 2010

Gimpasaurus Rex 

Tyrannosaurus Rex's that are heavily into BDSM. Just a kinky dinosaur.

Or to be used as an adjective for someone who is really into BDSM.

George: "Me and the Missus like to spice up the weekends with a bit whipping and paddling. She just loves being tied up while I spank her."
Kurt: "Woah, dude so you're like a Gimpasaurus Rex."
George: "Yeah, I suppose you could say that."

{George proceeded to put his hands on hips like superman with his hair blowing in the wind}

"I AM A GIMPASAURUS REX!!!!"

Gimpasaurus Rex by Xislac May 17, 2021