Television pharses?

well, I can tell you that jumping the shark came from the episode of Happy days where fonzie jumped a shark (I'm not kidding) and the show went totally down hill after that... Other ones...

pulling a Monica - monica's mom and dad say that when someone screws up...

Jumping the shark is a metaphor that was originally used to denote the tipping point at which a TV series is deemed by a viewer to have passed its peak, or has introduced plot twists that are illogical in terms of everything that has preceded them. Once a show has "jumped the shark," the viewer senses a noticeable decline in quality or feels the show has undergone too many changes to retain its original charm. The term has also evolved to describe other areas of pop culture, including movie series, music, acting celebrities, or authors for whom a drastic change was seen as the beginning of the end. These changes are often attempts to attract their fans' waning attention with over-the-top statements or increasingly overt appeals to sex or violence. Some have broadened its use to simply describe any decline in appeal for the subject in question, without requiring a significant "jump the shark" moment.

Jump-the-shark moments are typically scenes that finally convince viewers that the show has fundamentally and permanently strayed from its original premise. In these cases, they are viewed as a desperate and futile attempt to keep a series fresh in the face of a decline in ratings. In other cases, the departure or replacement of a main cast member or character or a significant change in setting changes a critical dynamic of the show.

They claim it was originated when Happy Days had Fonzie jump over a shark pen on water skis