Another term for two or more ladies gettin it on.
Dude i swear my girlfriend and her best friend are knocking boxes they are always sleeping and showering together.
by bassfreek August 11, 2008

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Top Definition
An act in which two or more women particpate in sexual intercourse in the scissor position.
"Dude last night in the shower those girls were totally knocking boxes."
by veevrede August 06, 2008

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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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