chum

"Chum" is a warm, slightly old-fashioned way to refer to a close friend—a buddy or a pal. Think of it as a casual term for someone you share a comfortable bond with. It is stronger than a mere acquaintance, implying a level of trust and shared history. The word has a charming history: it likely started in the 17th century as a shortened version of "chamber-fellow," essentially meaning a roommate. This gives it a sense of cozy, shared living space and long-term connection. While it's less common in modern slang than "mate" or "bro," using it today often feels a bit vintage, friendly, or joking.

It also has a practical meaning in fishing: "chum" can be bait (often chopped fish) thrown into the water to attract fish, and it can be used as a verb in that sense (to chum the water).

The word "chum" carries a delightful whiff of history and reliable warmth. It first appeared in the late 1600s as university slang for a "chamber-fellow." In those days, a chum was the person you shared your living quarters with—someone who saw you at your best and worst. This origin explains why the word suggests a bond forged through daily life and shared experiences. Over the centuries, it moved out of the dormitories and into the general population to mean any close companion.

While "chum" feels very friendly, it also has a completely different, more literal life in the world of fishing. To a fisherman, "chum" refers to a mixture of bait—often chopped fish—thrown into the water to draw fish in. This is why you may hear about a "chum slick" (a trail of oily scent on the surface) or see the verb in action: a crew might chum the water to attract fish. The origin of this fishing sense is separate from the “friend” meaning, and it is best treated as a different word that happens to share the same spelling and sound.

In modern English, the friendship meaning also appears in set phrases. To "chum around" with someone means to spend time together in a relaxed, informal way. You might hear "school chum" for a friend from school, and in direct address it can sound playful or slightly sarcastic (“Listen, chum…”), depending on tone. Whether you are talking about an old school friend or the bait used on a boat, the word remains a versatile part of English. If you have a true chum in your life, you have someone you can rely on through thick and thin!