The phrase “Jumped the Shark” supposedly comes from the Happy Days episode when Fonzie jumped a shark on waterskis, a sign that “it was all downhill from there”.
The people running the website JumpTheShark.com claim to be the originators of the phrase. But when I look at where they review Happy Days, Fonzie jumping the shark doesn’t even get a single vote for “Jumped The Shark when…”
So…. the phrase “Jump the Shark” was built on a concept that its creator doesn’t even stand behind despite building a sizable website and mystique around it.
There is some weird heavy-duty truism floating around in this somewhere.