gnash your teeth

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gnash (one's) teeth

To erupt or lash out in anger. The boss will definitely start gnashing his teeth once he hears about this printing mishap.
See also: gnash, teeth
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

gnash your teeth

COMMON If someone gnashes their teeth, they show their anger or annoyance about something. If Blythe heard that piece on the radio, I bet he was gnashing his teeth. He naturally gnashes his teeth over the growing number of lawsuits that have made doing business in America increasingly expensive and difficult.
See also: gnash, teeth
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012

gnash your teeth

feel or express anger or fury.
The gnashing of teeth, along with weeping or wailing, is used throughout the Bible to express a mixture of remorse and rage (for example, in Matthew 8:12: ‘But the children of the kingdom shall be cast out into outer darkness: there shall be weeping and gnashing of teeth’).
1998 Times Prepare yourself for the usual wailing and gnashing of teeth after tomorrow's retail price index figures.
See also: gnash, teeth
Farlex Partner Idioms Dictionary © Farlex 2017

gnash your ˈteeth

feel very angry and upset about something, especially because you cannot get what you want: He’ll be gnashing his teeth when he hears that we lost the contract.
The basic meaning of gnash your teeth is to bite or grind them together.
See also: gnash, teeth
Farlex Partner Idioms Dictionary © Farlex 2017
See also:
References in classic literature ?
Now, if ye were one of the cursed race of Campbell, ye would gnash your teeth to hear tell of it.
I don't know about you, but I'm forever screaming, wailing and gnashing my teeth, often just after a photo-finish (how do you gnash your teeth?).