PINCH-HIT

v. 1. To substitute for another player at bat in a baseball game. Smith was sent in to pinch-hit for Jones. 2. informal To act for a while, or in an emergency, for another person; take someone's place for a while. I asked him to pinch-hit for me while I was away. The president of the City Council pinch-hits for the mayor when the mayor is out of town. -