Meaning of “gnash your teeth” in the English Dictionary

british dictionary

"gnash your teeth" in British English

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gnash your teeth

to bring your teeth forcefully together when you are angry:

The monster roared and gnashed its teeth.

humorous to complain angrily and noisily about something:

New Yorkers gnashed their teeth about the governor's decision to raise property taxes.

(Definition of “gnash your teeth” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"gnash your teeth" in American English

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gnash your teeth

to show that you are angry or annoyed about something bad that you can do nothing to stop:

Petersen is gnashing his teeth over his inability to prove his innocence.

(Definition of “gnash your teeth” from the Cambridge Academic Content Dictionary © Cambridge University Press)