Used in areas of the American South - as of 2009 - ranging from South
Carolina, through
Georgia, Alabama, Mississippi and at least northern Louisiana. Indeed, the
sack doubtless referred to the burlap bag used to carry the fish, but no one questioned now remembers that particular use. Today it's the word traditionally used, at least in the areas mentioned, to mean "burlap bag" and is used to carry whatever articles that are at hand. "Croaker bag" has never been recorded.