The name given to wine, generally white, when removed from the cask. The sack is made of a strong foil, so it can be passed around without getting damaged.
It is a popular alcohol choice for Australian teenagers, as it costs no more than $15 for 4 litres, which is a very affordable way to get fucked up.
When one is intoxicated, they often drink the juice straight from the sack, although it is also commonly mixed with other liquids such as orange juice or soft drink, to make the taste more tolerable.

girl "Hey, pass the goon sack."
boy "Ok, do you want a cup, too?"
girl "Are you serious? I have it straight from the sack."
by bearcakes91 April 25, 2009
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Dreadful cheap wine which many Aboriginals and Australian youths get plastered on. Comes in silver bag (sack).
Gazza, get your goon sack out.
by Kempsey June 1, 2007
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Brilliant invention of wine in a bag, sold in a cardboard box. After you finish drinking it. You can blow it up and use it as a pillow.
The best part about drinking a goon sack is after your finished you can blow it up and use it as a pillow mate
by pantspirate June 9, 2009
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An Australian term for cask wine drank straight from the sack. A cheap way to get drunk quickly. Often the sack is then inflated, much to the amusement of the now quite drunk owner...
Mason: What you drinking this Friday night?
Tommy: Goon sack mate...
by goonsack September 26, 2010
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A silver sack filled with cheap wine which is found within a cardboard box. Drunk by youths in Australia due to its low cost however it promtes vomiting due to its awful taste.
Hey, you want to get and get a goon sack and get maggot
by michellecats October 1, 2006
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A beverage storage device which contains very cheap an nasty wine, which, is usually consumed by aboriginal's in Mungindi.
Wow Jessie looks fuckn smashed! Yeah he's been hitting the goon sack pretty hard today.
by Tony10133 August 20, 2010
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