Alex Trebek has jokingly referred to this situation (making a risky Final Jeopardy bet with a dominating lead) several times in the actual show as "pull[ing] a Cliff Clavin." see related link
Cliff Clavin was created in 1982.
Cliff's Notes The Wisdom of Cliff Clavin - 2004 V is rated/received certificates of: UK:PG
Clavin
Cliff Clavin of "Cheers"
Bette Davis
Answer: Carla did not like Diane Chambers or Cliff Clavin?
Season 9, Episode 19, "It's a Wonderful Wife"
John Ratzenberger, most well known as Cliff Clavin from Cheers.
The actor John Ratzenberger is most famous for his role as Cliff Clavin in the popular sitcom Cheers. He was also the host of the John Ratzenberger's Made in America.
John Ratzenberger's voice appeared in ever Pixar feature film to date. (He played mailman Cliff Clavin in the TV series Cheers).
Cliff Claven is a character played by John Ratzenbeger on the long cancelled TV show called Cheers. There were Jeopardy questions asked about John Ratzenbeger on shows that aired on these three dates 5 10 2005, 6 10 2004, & 1 19 2000. He was not on Jeopardy except maybe in the filming of the TV show Cheers.
The cast of Virtual Vera - 2004 includes: Ted Danson as Sam Malone Rhea Perlman as Carla Tortelli John Ratzenberger as Cliff Clavin George Wendt as Norm Peterson