In golf, caddy (or caddie) is the person who carries a player's bag, and gives insightful advice and moral support.

In the game, duplicate bridge, the caddy collects score slips after each round and/or moves boards (which contain the playing cards) between tables. He or she also assists the director with the setup before the game and the cleanup afterward.

In older computer hardware, the caddy was a plastic sheath that housed a CD-ROM. This sheath was then inserted into the CD-ROM drive.

Caddy is an affectionate nickname for a Cadillac automobile.

The word Caddy may have originated from the Malay word 'kati'. Kati is a measure for tea leaves and is printed on boxes used to carry and collect the tea leaves, hence its use in terms reflecting carrying and collecting.