To claim that something is bird law is to acknowledge that a subject or predicament has unwritten rules that should be followed, usually pertaining to women.
Bill-Hey dude that chick was totally feeling you at the club...

Tod-Yeah but its bird law i have a girlfriend...

Bill- Can i have her number then?

Tod- Why?

Bill- Bird law dude...bird law
by Theseeker3000 December 05, 2009

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

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The Urban Dictionary T-Shirt

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Top Definition
You absolutely can't own a humming bird, but you can however own a gull but you don't want to live with a sea bird, it'll blast your eardrums out.
You absolutely can't own a humming bird, but you can however own a gull but you don't want to live with a sea bird, it'll blast your eardrums out. - was stated by the bird law master
by keys takes it deep December 06, 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