Shrinkage of the scrotum due to cold temperatures. Used figuratively to describe cold weather.
"Man, it's raisin sack weather out there today! Put on your winter jacket!"
by Joe Lederhans October 08, 2013
1 more definition
The scrotum of a coward.
Craig's raisin sack prevented him from facing any sort of confrontation.
by ecombitch September 16, 2013