grit one's teeth
- To clench one's teeth together tightly because of pain or anger or frustration.
- To face up to a difficult or disagreeable situation, and deal with it.
- There's a storm coming, so I grit my teeth and start rowing with all my might.
- (face up to a difficult or disagreeable situation): face up to, bite the bullet, grin and bear it, suck it up
clench one's teeth together