walk-off

Short definition from Wiktionary

Adjective

1. 1
   That drives in a run that ends a game.
2. 2
   By extension, any scoring event in sports that ends the game.

Noun

1. 1
   A prisoner who escapes custody without violence by taking advantage of the opportunity provided by negligent or distracted guards.
2. 2
   A walkout.
3. 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.

Verb

1. 1
   To recover from (a minor injury) or digest (a large meal) by walking around.
2. 2
   To measure a distance by walking, as by counting paces or extending a measuring tape or rope.
3. 3
   To flee or abandon.