Top Definition
Commonly known as a sleeping bag.
"Don't forget your fart sack!"
by Helen Robinson January 25, 2006
Sleeping bag (esp. a heavily-insulated military-issue bag)
by Alo Konsen September 15, 2003
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
A sleeping bag.

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