pinch-hit
US /ˈpɪntʃ.hɪt/
UK /ˈpɪntʃ.hɪt/
1.
to bat in place of another player, typically when a hit is particularly needed
:
•
The coach decided to have the rookie pinch-hit in the bottom of the ninth.
•
He was brought in to pinch-hit for the injured player.
2.
to act as a substitute or fill in for someone in a difficult situation
:
•
When the main speaker got sick, I had to pinch-hit and give the presentation.
•
She's always willing to pinch-hit when someone needs help.