walk-off

Adjective

 * 1)  That drives in a run that ends a game.
 * Scott Podsednik hit the twelfth walk-off home run in World Series history on October 23rd, 2005.
 * 1) By extension, any scoring event in sports that ends the game.

Noun

 * 1) A prisoner who escapes custody without violence by taking advantage of the opportunity provided by negligent or distracted guards.
 * 2) A walkout.
 * 3)  Any event or action in the bottom of the last inning of a game that scores a run and thereby ends the game with a victory to the team at bat.