Top definition
The suspicious backpack seen on college campuses everywhere on Saturday night, never filled with books or study materials. Filled with anything from a 30 of beer to handles of liquor.
Dude, are you bringing that thirty of natty ice in your Saturday night backpack later?
by HansHansHans February 10, 2009
Get the mug
Get a Saturday Night Backpack mug for your Facebook friend Julia.