A roommate, especially in a college or university; an old and intimate friend.
- An intimate friend or companion.
- To be an intimate friend.
- To display good-natured friendliness: chummed around with the other teammates.
- To share the same room, as in a dormitory.
- Bait usually consisting of oily fish ground up and scattered on the water.
- To fish with such bait.
- To lure (fish) with such bait.
- A chum salmon.