“Tell me I’m not your man from Porlock. I’d never forgive myself.”
I read that in David Mitchell’s Utopia Avenue and was like: huh? So I looked it up. Jeepers!
Shared it with my friends, and one one of them, Jim, proposed the term be employed à la Good Will Hunting badinage, e.g. “I was working on my proof when @#&$% Captain Porlock here…”