COLIN IS JOST WHAT JENNINGS FEARS MOST!

JEOPARDY'S Ken Jennings is royally miffed after being passed over to host a new spinoff of the hit game show, but he's being warned to keep his mouth shut about it or risk getting the boot entirely, say sources.

Longtime Saturday Night Live star Colin Jost, 42, was chosen ahead of Jennings, 50, to helm Pop Culture Jeopardy, a team game focused on topics like alternative rock, sports, film and Broadway. Production for the show, which will stream on Amazon Prime, begins this month.

"It's open knowledge in Jeopardy circles Ken feels slighted," dishes an insider.