Thanks very much for that explanation of "jump the shark", nhoward! I never did understand it until now. And thanks for asking the question, StoneWall.
Kofi please go to hell.
I'm surprised it isn't in the FR lexicon. Maybe it is assumed to be too ubiquitous for documentation.
I know that most people I run into who are under age 25 know what jumping the shark is even though they weren't alive when the first shark jump occured.