Top Definition
A bag or satchel worn by a sorority girl, usually a Red Bull or Jordan baller bag taken from the fraternity they shacked in the night before. The girl then wears this carrying case back to her sorority early the next morning (see Walk of Shame).
"Yo Chaz, check that dame across the median!"

"What about her bro?"

"I was just wondering what frat she stayed in last night to pick up such a sweet shack sack!"
by FratBag100 February 07, 2010

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