Top Definition
A dinosaur of a status of rolling on the floor laughing
"Oh my god that is so funny! Roflsaurus rex!
by the Roflsaur October 13, 2005

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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
by Rofl at you mother March 14, 2009

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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."
by Dyelineye Carlineye September 18, 2008

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt