An art director or client that makes numerous minor and/or pointless changes to a project, believing that what they're doing will make the project hundreds of times better.
Production guy #1: "Is that project done yet? It's got to go to press!"
Production guy #2: "Nope, the client is still being a taste fairy."
Production guy #1: "Cripes, it's just a newspaper ad. It's not like it'll win an award."