"Chetestapant” (chef + contestant + participant) has been used on the popular website Eater.com (cited in print since at least June 17, 2010), always in reference to the Bravo network television show Top Chef.
The word “cheftestant” (chef + contestant) is an older term to describe the same person.
Top Chef D.C. Premiere: My Country Ribs Of Thee
Thursday, June 17, 2010, by Max Silvestri
After some shopping and prepping, the cheftestapants show up at the banquet hall and begin serving lots of “well-dressed” and “cool” D.C. people.
Dale Levitski Will Not Allow Children to Ruin Brunch
Thursday, March 10, 2011, by Paula Forbes
When former Top Chef cheftestapant Dale Levitski starts serving brunch at his Chicago restaurant Sprout on March 20, don’t expect to be able to bring your kids along: they’re not allowed.
Carla Hall Is Now a Spokesperson For Fancy Feast Cat Food
Thursday, May 12, 2011, by Paula Forbes
Oh, dear: former Top Chef cheftestapant Carla Hall is now a spokesperson for Fancy Feast. You know, the cat food company?
Top Chef Gives Cheftestapants A Second Chance To Lose
Tuesday, September 20, 2011, by Amy McKeever
Because it wouldn’t be Top Chef without nonsensical plot twists, Bravo has announced that the upcoming season of the show will feature various gimmicks called “transmedia play.” What does this mean?
Thursday, January 26, 2012, by Raphael Brion
Yesterday’s New York Times style section ran a fake trend piece about man buns, in which men put their hair into a Snooki-like modified chignon. One example cited was Chris Jones, a cheftestapant on Top Chef Texas and chef de cuisine of Moto in Chicago, who told the Times, “I’m very secure in myself. I’ve actually worn my hair in pigtails once or twice.” Oh, and spoiler alert, you guys: Chris Jones was sent home last night.