Top Definition
A type of manbag, but far more cool! Used by Jack Bauer of 24 to carry his awesome and unlimited arsenal of weapons to take on the terrorists that threaten the US
Jack: Dude, that manbag is so lame, you need to get yourself a Jack Sack

Tony: Copy that
by Paulstudy March 27, 2010
To be a total bastard loser.
Mike:Dude I got paid today.
Jeff:So damn what? I get paid next week.
Mike:Dude, your a total jacksack.
by MI NA October 29, 2008
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