Top Definition
1. The penis that a woman never intended letting in but realizes after a drunken night that the penis had made it in. As if the member had sneaked in with the stealth of a ninja.

2. An erection that happens at any moment that surprises a women.
1.She said there was no way they were ever hooking up. He just called form her bed. He's got ninja penis.

2. They were slow dancing and was poked by his ninja penis.
por Jon Lincoln 12 de Abril de 2011

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1. The penis that a woman never intended letting in but realizes after a drunken night that the penis had made it in. As if the member had sneaked in with the stealth of a ninja.
1.She said there was no way they were ever hooking up. He just called form her bed. He's got ninja penis.
por Jon Lincoln 12 de Abril de 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
A penis, made by a ninja it is normally a super long rod that you can hit your mates with. You can also stick it up peoples vagina holes. It's great.. I use them all the time
James: Can I show you my Ninja Penis?
Jessica: Only If you stick it into me ;)
por Magicarsewhipe 05 de Abril de 2009

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
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