OK, I'll say it...
Has Jump The Shark jumped the shark? ;-)
It gets it's name from the Happy Days episode wherein Fonzi jumped over sharks on waterskis.
It's hard to define "jumping the shark" these days because everything on the air is just sooooo out there. Nothing seems to quirky and most of it is just flat out dumb. I guess, if I had to pick one show which has "jumped," it would have to be Navy NCIS. However, like I mentioned before, it's hard to tell. NCIS started out with unbelievable scenarios and characters. That being said, it's still my favorite show on T.V.
The phrase "Jumped the Shark" has "Climbed the Piano."
I like the website. I read the Simpsons comments often. The posters vary between the delusional "the show is still hilarious" and the morose "the show is horrendous and should be cancelled NOW" types.