set (one's) teeth

set (one's) teeth

To be or become resolute and determined (to do something). Despite his ankle sprain, the batter stepped up to plate, set his teeth, and knocked the ball out of the park. We just need to set our teeth and do what needs to be done.
See also: set, teeth
Farlex Dictionary of Idioms.

set your teeth

1 clench your teeth together. 2 become resolute.
See also: set, teeth
Farlex Partner Idioms Dictionary
See also:
  • set your teeth
  • curve ball
  • curveball
  • the plate
  • dust off the batter
  • gopher ball
  • step up to the plate
  • beanball
  • drop (one's) teeth
  • drop one’s teeth