Top Definition
A very large jerkoff-half dinosaur like human of the Upper Cretaceous Period of North America, characterized by having strong wrists and a large head. Also know to some Canadian dwellers as jerkoffskie
Jerkasaurus is owning up!
by Last_Assassin January 14, 2004

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the king of jerks - total idiot - loser
you're a real jerkasaurus.
by j.bowen January 01, 2007

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The Urban Dictionary T-Shirt

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A dinosaur sized jerk.
Lindsay is a jerkasaurus!
by Sef1989 April 19, 2011

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The Urban Dictionary Mug

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The Urban Dictionary Mug

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

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A person who has exhibited abnormally large amounts of rudeness or has said something especially heinous.
Kelly walks into the room...

"Well hello Kelly McFatass! Quick grab a chair! Outta breath already, aren't ya?"- Ian

"Ian you are a jerkasaurus!!!"- Kelly
by K-rex15 May 16, 2012

The Urban Dictionary Mug

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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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The Urban Dictionary Mug

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