Chum can mean:
- a friend (chiefly a U.K term but also fully understood in U.S)
- a type of salmon (Oncorhynchus keta), native to the northern Pacific and adjacent waterways
- a mixture of fish parts and blood used to attract sharks
- any foods used to attract fish or other aquatic animals for viewing
- CHUM, the callsign of a major radio station in Toronto
- Canada's CHUM Limited, owner of CHUM, CITY and MuchMusic [1]