grit one's teeth

grit one's teeth

Summon up one's strength to face unpleasantness or overcome a difficulty. For example, Gritting his teeth, he dove into the icy water. This expression uses grit in the sense of both clamping one's teeth together and grinding them with effort. [Late 1700s]
See also: grit, teeth
References in periodicals archive ?
For many SMEs there is little response one can make to this tactic other than grit one's teeth and smile politely.