Here in Arizona I've known it as gunnysack but I understand that in the Northeast it is known as a burlap bag and in Eastern North Carolina a tow bag. In Georgia is may be called a crocus sack and in the gulf states a croker sack
There is a sack lunch
I included a video in case you would like to learn to play.
And if you are a football fan you would know that when the quarterback gets tackled behind the line of scimmage it is a sack.
There is that slang (still in the sack)
Here in the city people are encouraged to bring a sack when they walk their dogs and pick up after them .....