Real Dictionary

chum
Your chum is your friend.

chum in American English 1
a roommate
to share the same room
intransitive verb: to associate closely
noun: a close or intimate companion

chum in American English 2
fish or mollusks cut into pieces and scattered in the water to attract game fish to a fishing area
to use chum to attract fish
intransitive verb: to fish by attracting fish by dumping cut or ground bait into the water
noun: cut or ground bait dumped into the water to attract fish to the area where one is fishing
transitive verb: to dump chum into (a body of water) so as to attract fish

chum in American English 3
chum salmon
noun

chum in British English 1
noun: a close friend
verb: to be or become an intimate friend (of)

chum in British English 2
noun: chopped fish, meal, etc, used as groundbait

chum in British English 3
noun: a Pacific salmon, Oncorhynchus keta