(idiomatic, informal) To be friendly toward (with or to) someone, especially in an ingratiating way; to form a friendship (with).

(slang, UK) A user or fan of the Sinclair ZX Spectrum computer.

plural of chum salmon

simple past tense and past participle of chum up

present participle of chum up

(idiomatic) Something done or said that produces or is likely to produce an intense, vigorous reaction, especially with a conscious or deliberate intent of causing such a reaction.

(uncountable) The condition of being chums; friendship. / (social sciences) preadolescent friendship between two people of the same sex

plural of chumship

plural of chumsicle

A compact (sometimes frozen) ball of chum for feeding to sharks