Roflsaurusrex 

The dinosaur that runs around and makes a ROFL noise when it runs jumps and eats usually stated after a funny joke.

I herd this joke from jack and i couldnt stop laughing its like the Roflsaurusrex was in the room XD

Roflsaurusrex by Rofl at you mother March 14, 2009

roflsaurus rex 

A dinosaur of a status of rolling on the floor laughing

"Oh my god that is so funny! Roflsaurus rex!

roflsaurus rex by the Roflsaur October 13, 2005

roflsaurus rex 

Pronounced rah-full-sore-us rex; Someone acting like an idiot or someone being incredibly stupid... so stupid that it's funny.

"Look at that roflsaurus rex."
"What a roflsaurus rex."
"Oh my god, roflsaurus rex."

roflsaurus rex by Dyelineye Carlineye November 1, 2008