Top Definition
Commonly known as a sleeping bag.
"Don't forget your fart sack!"
by Helen Robinson January 25, 2006

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Sleeping bag (esp. a heavily-insulated military-issue bag)
by Alo Konsen September 15, 2003

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sleeping bag
the good fart-sack is mine,you can have the world war one vintage bag its bear proof.
by dang May 08, 2003

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A sleeping bag.

A bed.
My ass is going to hit the fartsack.
by Bumkicker Slade April 24, 2005

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1. Sleeping bag

2. A sack full of farts, much like the bag of winds given to Odysseus by Aeolus in Homer's "The Odyssey". Often used as a device to propel ships.

3. See "crapsack"
1. Did you bring your fartsack?

2. I've been stuck on this boat in the middle of the ocean for days! I could really use a fartsack right now!

3. The waiter was being a total fartsack.
by Rachel Woodhouse November 30, 2006

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The Urban Dictionary T-Shirt

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A sleeping bag.

By extension, a bed.
Man, I'm going to hit the fart-sack. See in in the morning.
by Bumkicker Slade April 24, 2005

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The Urban Dictionary Mug

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

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The cover sheet on your mattress.
When doing the laudry today, don't forget to wash the fart sack.
by victorzulu November 27, 2010

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The Urban Dictionary 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