Hi there m'dear! I was going to explain it to you but Shuhak did a fine job of doing so. Please read the reply he provided because he did an excellent job and in fewer words than I would have used which is always a treat! Thank you for your reply and Happy Monday! :)
I know the term "jumping (or jumped) the shark" came from the TV series Happy Days. It means that something has gone its course (as Fonzie, a lead character in the show, jumped over a shark on water skis. The writers had run out of material to continue the show, signaling that the the show had run out of material to continue (although the series Happy Days somehow managed to limp on for another 5 seasons after it "jumped the shark".
Precisely Shuhak. I wonder when the prez will jump the shark or d'ya think he may already have? Thank you for your informative reply. I was going to explain it to Addb who is not American but now I shall just ask her to read your reply! Happy Monday m'dear! :)