Top Definition
Adjective- The person who is responsible of someone's retarded act and or retarded way of saying something.
"Oh man, I totally just slipped on a banana peel Tom threw in front of me."

"LOL Tom is totally the derpetrator of this situation here."

"I hate Tom with a burning passion."
by TheDerpetrator November 17, 2011

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One who is responsible for committing a stupid act.
One of my roommates left the oven on. Again. Okay, guys... who's the derpetrator here?
by spiffy_kimbean April 19, 2011

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

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

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

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