A caddy. In golf, a person hired to carry a player's clubs, find the ball, etc. Outside of golf, a person who runs errands, does odd jobs, etc.
From the Bill Murray character (groundskeeper Carl Spackler) in the 1980 movie "Caddyshack", "So I jump ship in Hong Kong and make my way over to Tibet, and I get on as a looper at a course over in the Himalayas. A looper, you know, a caddy, a looper, a jock
. So, I tell them I'm a pro jock
, and who do you think they give me? The Dalai Lama, himself. Twelfth son of the Lama. The flowing robes, the grace, bald... striking."
Since the intern was not busy, I paid him $20 to be my looper for the day. He picked up my dry cleaning, washed my car and filed all my reports.