wearing two pair of tighty-whitey underpants in an attempt to warm the balls
before going ice fishing, Adrian made sure to sack pack so as to avoid shrinkage.
by the vins April 01, 2006
A draw string bag that is often used by athletes. it is one of the few types of bags that a guy may use for non-academic material and not be considered gay. it is by no means to be confused with a murse.
"did you see the guy with sackpack I bet he plays a lot of sports."
by dacrazy1 November 08, 2011
A bag held together by string that is typically worn on the backs of athletes for the holding of non-academic material such as cleats, frisbees and lipstick. It can sometimes and understandably be confused with a murse. The owner of the sackpack can be mistaken for a gay man when in reality, he just plays a bunch of sports.
Person 1: Did you see that guy with the sackpack? I bet he plays a lot of sports.
Person 2: Yeah, I bet he's the team rump ranger.
Person 1: Word.
by your girlfriend wins November 16, 2011

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