non-runner

Noun

 * 1) One who does not take part in the physical activity of running.
 * 2) A racehorse that is withdrawn before the start of a race.
 * There were two non-runners in the three o'clock at Puddletown.
 * 1) A vehicle that cannot move under its own power, owing to mechanical defect or failure.
 * The Merc on the forecourt is a non-runner.