You know what's funny about this:
Of course, the phrase has entered the lexicon, but Happy Days "jumped the shark" a long time before the Fonz actually jumped the shark.
Remember Pinky Tuscadero?
Or how about this . . . I'll bet almost nobody remembers this, and frankly I was shocked to see it left in the syndicated reruns.
Fonzie's nephew, Spike: "Hey, Cunningham -- about your sister's build . . . " and he gives the thumbs-up.
Richie: She's eleven.
Spike: Yeah, but she's built like she's twelve.
This is not a joke.
This actually occurred on Happy Days and you can still see it.