There's an underappreciated movie called "Funny Bones" - Oliver Platt, Jerry Lewis (don't let that stop you), and this super-gifted physical comedian named Lee Evans. In it, one of the devices that drives the plot is a human foot that washes ashore at Blackpool, England. In a press conference, the manager of the beach resort characterizes it as a one-off. A couple of days later, *another* human foot washes ashore, and the press reconvenes. One of the reporters says "I thought you said it was a one-off." The manager, facing the press, insists "Well, of course it's a one-off. Two feet, but off one *person*"

The very blackest of comedies... if you go for that kind of thing, as I do, I recommend it.

But that was my first exposure to the term - and that's forever how I'll remember it.