A type of knot often used by millers to fasten the neck of a sack of grain or flour.

plural of bag knot

A bag for securely holding sensitive or classified documents which are to be destroyed by fire or pulping after a certain period of time.

plural of burn bag

A bag made of paper, especially a firm brown kind intended for use carrying groceries.

plural of bag of mystery

(slang, humorous) A sausage.

(cycling, slang) A cyclist's musette or satchel used to carry food to counter "bonk" (sudden glycogen depletion).

plural of bonk bag

plural of airline bag