1. An old man, typically one who lives in a rural place. The word is thought to be a contraction of "godfather." Only gaffers live out here—I bet you're the youngest person for 20 miles!

2. The main electrician responsible for the lighting on a film or TV set. No, I don't like the lighting in this shot—where's the gaffer?

3. Someone who others report to, as at work. It can refer to a boss or a fellow employee. Primarily heard in UK. The gaffer's going to be in the office tomorrow, so you better get here on time for once.