Top Definition
a large sac of marijuana.
"Let me buy that fat sac off you."
by tha dude December 17, 2006

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Its a sac of fat that is someplace on your body you don't want it
you're a fatsac
by The gr 6 class of holy name May 28, 2011

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A water filled bag used to add ballast to boats in order to produce a larger wake. This enables wakeboarders to get more air.
The Fat Sac ads up to 600 pounds of weight to your boat.
by TT September 12, 2003

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The Urban Dictionary Mug

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The Urban Dictionary T-Shirt

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The Urban Dictionary T-Shirt

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An exceptionally large scrotum.
DAMN!!!!! DAT fool's got a FAT SAC!!!!
by fun-o-bunz August 13, 2003

The Urban Dictionary Mug

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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