Top Definition
The stealthy little bastard that haphazardly leaves brown marks on your undies. Also acts as a scapegoat to take the blame for unexplained events for which you would normally be blamed.

Also known as the pantie assassin (for girls :-p )
Damn - the poo ninja's dealt to my tighty whities!

Dad: "Where'd all the change from my jeans' pocket go?"
Son: "poo ninja must have got it."
by Dion_B June 13, 2006

The Urban Dictionary Mug

Lotsa space for your liquids.

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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.

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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
The stealthy little bastard that haphazardly leaves brown marks on your undies. Also acts as a scapegoat to take the blame for unexplained events for which you would normally be blamed.

Also known as the pantie assassin (for girls :-p )
Damn - the poo ninja's dealt to my tighty whities!

Dad: "Where'd all the change from my jeans' pocket go?"
Son: "poo ninja must have got it."
by Dion_B June 10, 2006

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