Pinch hitter
WordNet
noun
(1) (baseball) a substitute for the regular batter
WiktionaryText
Noun
- A substitute batter; one who pinch-hits.
- An aggressive batsman brought on to score runs quickly, even at the risk of losing his wicket.
- An individual who substitutes for another to perform one or more tasks.
- I'll be sending a pinch hitter to do the presentation because I have the flu.