noun
plural chums
[count] informal + old-fashioned :a close friend
verb
chums; chummed; chumming
[no obj] chiefly US informal :to spend time with someone as a friend - usually + around
chum up
[phrasal verb] Brit informal :to become friendly - often + to
noun
[noncount] :pieces of fish thrown off a boat as bait to attract other fish - compare 1chum
verb
chums; chummed; chumming
[no obj] US :to throw pieces of fish off a boat as bait to attract other fish - often + for