You'd have kept right on surfing while your next-door neighbors were gnashing their teeth and playing board games.

He'll be gnashing his teeth when he hears that we lost the contract.

I fear starting a neighborhood feud, but I’m also grinding my teeth.

But some families brought together through marriage can be so different that the best everyone can do is grit their teeth and work extremely hard to get through a weekend together.

He gnashes his teeth when his beloved Cal football team loses, wears only Cal gear, and holds a football close to him for comfort, like a big kid's version of a teddy bear.