??
JUMP THE SHARK:
Keith Olbermann actually explained this term in one of his columns:
http://www.jewishworldreview.com/0604/olbermann061804.asp
Sorry, I wasn't able to cut and paste. Apparently Fonzie, on Happy Days, water skiied over some sharks. This story line was apparently used out of desperation as the series began to lose viewers.
As another poster mentioned, there's also a "Jump the Shark" website that names similar instances of when something begins to lose its popularity.
Yeah,just exactly WHAT does it mean to"Jump The Shark"?