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2.
1. When shit just doesn't go your way...
2. An exclamation of the above, usually accompanied by a swear word.

1. Ever had a day when, from the moment you woke up, things just went gunnysack on you?
2. Oh shit! I spilled my milk! Well that's just gunnysack!
by ~Misunderstood~ November 08, 2007
 
1.
An old wild western type of bag with draw strings, that often carry potatoes, corn, and other types of goods. Hobos and rail riders would often take these sacks and make pants out of them.
May also be used as an insult, indicating you are lazy, or a bum.
"Your so hot, you would look good in a gunny sack."
"You freakin gunny sack, go take out the trash."
by Juliawl July 08, 2009
 
3.
A condom; thin rubber or latex barrier device worn over the penis. May also refer to an improvised or jury rigged condom. Often used to emphasize the large size of the penis.
Bitches better take their cunt pills cuz I ain't wearing no gunny sack.

She only had kimonos so I used a sock for a gunny sack.
by the biggest g January 09, 2011
 
4.
slang for "condom"; prophylactic.
And go pick up some gunnysacks while you're out, you slut!
by ss098 August 11, 2006