grind (one's) teeth

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grind (one's) teeth

To internalize one's anger without expressing it externally. The image is that of a person literally grinding their teeth together out of anger. Don't just sit there, grinding your teeth—if you're mad at me, let's talk about it.
See also: grind, teeth
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

grind your teeth

If someone grinds their teeth, they are angry about something, but do not express their anger. We journalists, who once were just like him, grind our teeth as we contemplate his success. Note: You can also talk about grinding of teeth, teeth-grinding, and tooth-grinding. There has been much grinding of teeth about what is seen by the government as the harshness of the European Community's decisions. When you are a little boy of nine, your father can seem like a hero one minute, only to cause you tooth-grinding embarrassment the next.
See also: grind, teeth
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
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References in periodicals archive ?
It is good to see that our relatives are getting some history books that tell their history in a way that can be read without cringing or grinding one's teeth in rage at either a one-sided analysis of what happened in this country or, even worse, a dismissal as not being important enough to be included except perhaps as a land donor in history being told of this land and its people.
Perhaps our politics have become so personal and so laced with venom that it has become impossible to approach an issue without grinding one's teeth over an individual who has come to represent all that one despises.
Bob Dole on C-Span without subsconsciously grinding one's teeth. Personal spending habits are a function of our expectations of the future.