(dated) A friend; a pal. / (dated) A roommate, especially in a college or university.

(intransitive) To share rooms with someone; to live together. / (transitive) To lodge (somebody) with another person or people. / (intransitive) To make friends; to socialize.

(fishing, chiefly Canada, US) A mixture of (frequently rancid) fish parts and blood, dumped into the water as groundbait to attract predator fish, such as sharks

(fishing, transitive, intransitive) To cast chum into the water to attract fish.

(pottery) A coarse mould for holding the clay while being worked on a whirler, lathe or manually.

The chum salmon

simple past tense and past participle of chum

present participle of chum

(military, aviation, historical) The use of a lit aeroplane to draw enemy fire so that the enemy can be destroyed by another aeroplane whose lights are off.

A surname.