A nickname sailors gave for the quad 1.1"/75 caliber anti-aircraft gun used during World War II. The gun was commonly found on navy ships.
The Japanese fighter made it past the ship's fighter screen, but it was shot down by a Chicago Piano.
by ped11 April 29, 2011

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Top Definition
1920's big-city term when mobsters refered to their tommy guns as "pianos" Al Capones and Bugs Morans gangs went to the mattresses with their chicago pianos.
old lady: what do you gentlemen have in those cases, violins?
mobster: no ma'am their our pianos, and we get paid well for playing them
by BIG J February 03, 2005

The Urban Dictionary Mug

Lotsa space for your liquids.

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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.

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.

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