Top Definition
A person who is very subtle or sneaky when it comes to looking at a female's breasts.

Used as a compliment by males and a warning or an insult by females.
Girl1: Bob said that he didn't masturbate. He's so lying.

Girl2: I dunno. Maybe he's telling the truth. I mean, I've never seen him look at a girl's boobs before.

Girl1: That's because he's probably a boob ninja.
by Littleman29 February 24, 2010

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The Urban Dictionary Mug

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The Urban Dictionary T-Shirt

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A ninja that is addicted to boobies and possibly cocaine.
Woah, that boob ninja was totally just checking me out.
by The Waffler December 08, 2005

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.

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