coined by Marshana Ritchie on season 12 of The Bachelor, popularized by Ellen DeGeneres on her talk show
The origins of this term may lie in the movie "Zoolander," in which the main character, a model, challenges his rival to a walk-off.
--Daniel Vosovic, celebrity designer of the television show "Project Runway," reacting to a request that the show's models give a demonstration walk to determine which model would be eliminated.
Sasha: Bitch, you ain't got nothin' on me. I'm the hottest thang on the runway.
Chloe: Oh no you didn't...Oh no you didn't! Bitch, whatcha gonna do?
Sasha: I challenge you to a walk-off. Right here, right now.
Chloe: Bring it!
Sasha: Oh in about two minutes it's gonna be brought, and someone's gonna have to bring your broke ass home.
Random people: Clear a path! It's a walk-off!
History: Apparently the term was first coined by Dennis Eckersley after giving up a “walk off piece” to Kirk Gibson in game one of the 1988 World Series. While the initial usage was considered negatively toward the loosing team (especially the pitcher) it is more prominently used in a celebratory fashion for the hitter.