Top Definition
When a fat persons back is squeezsd together to resemble a butt crack.
1. Bill Clinton likes when he gets a glimps of pure unadulterated Back crack.

2. Most people hate it when a bead of back crack sweat slide into their butt crack.
by John Mousie February 17, 2009

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When the asscrack starts at the lower back.
look over there is that his ass crack? No his pants are up it's his back crack
by logan December 21, 2003

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The Urban Dictionary T-Shirt

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A butt crack that extends above the waistline sometimes even to the middle of the shoulder blades.
Man JD has a bad case of backcrack!
by superknox1andonly December 22, 2014

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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

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