Originally Posted by HarryT
What does the expression "jumped the shark" mean? Haven't come across that one before.
It comes from the TV show Happy Days. During the later series, when ratings were flagging, the Cunninhams went on vacation to the beach, and Fonzie rode waterskis to jump a shark
(warning: TVtropes link), which was received as a publicity stunt to increase ratings with no regard to the internal storylines of the show.
It's come to mean "blatant attempt to draw in new/lost viewers that interferes with current viewers' enjoyment."