A name given to a rusty old claptrap Ford Fiesta. An alternative to 'Uncle Fester The Fiesta'. The name is a spoof of Uncle Fester (Fester Adams) from the Adams Family who is portrayed to be stupid, old and ugly.
Guy 1: Hey dude, the Fiesta failed it's MOT, guess it's time to scrap the pile of junk
Guy 2: Ohh dude,. I'm gonna miss the festering fiesta