set your teeth

set (one's) teeth

To be or become resolute and determined (to do something). Despite his ankle sprain, the batter stepped up to plate, set his teeth, and knocked the ball out of the park. We just need to set our teeth and do what needs to be done.
See also: set, teeth

set your teeth

1 clench your teeth together. 2 become resolute.
See also: set, teeth
References in periodicals archive ?
But if you think he's given up those saccharine puns that set your teeth on edge, think again.
THE one thing guaranteed to set your teeth on edge in Hustle are the twee little fantasy inserts.
In the spring the sea air blights the blossoms of the stunted fruit trees, so that you think yourself lucky to find a wizened apple, though it will set your teeth on edge should you try to eat it.
But no debate on its definition - an irritation, a pain in the backside, somebody guaranteed to set your teeth on edge every time he opens his mouth.