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Definition of chum:

  1. A roommate, especially in a college or university; an old and intimate friend.
  2. Chopped pieces of fish used as bait.
  3. To occupy a chamber with another; as, to chum together at college.


confederate, bud, associate, musketeer, helpmate, firm friends, compadre, blood brother, sidekick, accomplice, crony, peer, buddy, alter ego, near, confidante, pal, love, brother, coadjutor, chum salmon, girlfriend, consort.

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