gnash teeth, grind teeth

Definition

To gnash or grind the teeth means to clench the teeth and scrape them back and forth against each other. This often shows extreme pain or anger.

The Bible tells us that gnashing teeth is one thing those in hell will do in their terrible distress.
If your culture does not associate grinding the teeth with anger, it can be translated as “grinding of teeth in anger.” Or you could use a way that people express anger in your culture, such as “stomping your feet” or “clenching your teeth” or “snarling.”