pinch hitter
US /ˈpɪntʃ ˌhɪt.ər/
UK /ˈpɪntʃ ˌhɪt.ər/
1.
a baseball player who bats in place of another player, especially when a hit is particularly needed
:
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The coach sent in a pinch hitter in the bottom of the ninth inning.
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The pinch hitter hit a home run to win the game.
2.
a person or thing that is brought in to help in an emergency or difficult situation
:
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When the main speaker got sick, they had to find a pinch hitter at the last minute.
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Our team needed a pinch hitter for the critical project.