derpiesaurus 

A dinosaur that is everything derp. A derpiesaurus is created when you mix Herp DNA with a Derp DNA. When the derpiesaurus growls, he/she seemingly sounds like a person who is saying Herp da Derp. It sounds 9000 times better than when a human says it.

Derpiesaurus is very rare and has been only spotted by a few people. Some have spotted the amazing creature when someone says or does something extremely stupid or obvious. Other times, people have hallucinated a derpiesaurus, such as when trippin on LSD or shrooms. Scientists are still unsure of its existence though

man 1: I didn't know africa had white people living on it!

man 2: ... DUDE LOOK OVER THERE

man 1: OH FUCK WHAT IS THAT?

man 2: OH MY FUCKING BALLS! ITS A FUCKING DERPIESAURUS. FUCK. MY LIFE IS COMPLETE NOW!

derpiesaurus by SOMEONE YOU MAY OR MAY NOT KNO October 4, 2011

Derpasaurus 

One who says or does too many things that are or relate to derps. the word emphasizes how much the person derps that it theoretically amounts to the size of a dinosaur, therefore it is adequate to address the person as a "derpasaurus".

"Dude, how did you get that question wrong again? you derpasaurus".

Derpasaurus by AuntJemima46 November 23, 2010

Derpasaurus Rex 

A name coined for the dinosaur that appears at the end of the stage 'Dino Dino Jungle' in Gamecube's "Mario Kart: Double Dash!" The Derpasaurus sticks his face across the bridge as you are karting across.

Player 1: "dude, the derpasaurus rex knocked me off of the bridge!!! "

Player 2: "figures broski, he's crosseyed"

Derpasaurus Rex by Broviet Russia May 18, 2011

derpisaurous rex 

A derpisaurous rex is a beautiful, majestic creature. He bathes in the showers of derpiness, he eats derps for breakfast.

"That derpisaurous rex is eating a cabbage! Mom! Get the camera!"

derpisaurous rex by ChunkyMama69 November 17, 2015