pinch hitter
idiomPart ofpinch
pinch hitter — idiom
1. in baseball, a player sent to bat in place of a teammate at an important moment;
1.idiom
Definition
in baseball, a player sent to bat in place of a teammate at an important moment; more generally, someone who steps in to do a job at short notice.
Example
The coach sent in Marcus as a pinch hitter in the ninth inning.
Sarah acted as a pinch hitter when our regular speaker fell ill.