1. (baseball) to bat in place of another player
   "The coach decided to pinch-hit Jones for the struggling batter"
    
2. [informal] Do something in the place of another person who is not able to perform or is less skilled; to substitute or stand in for somebody
   "When the regular presenter fell ill, I had to pinch-hit and give the presentation"

Derived forms: pinch-hits

Encyclopedia: Pinch-hit