His teeth are chattering like castanets and he's repeatedly slapping his leg.

My teeth chattered like castanets, jarring in my jaws until it was painful.

While he was dressing his teeth chattered like castanets in a minstrel show.

One of the water, while his companion remained in the tree, his teeth chattering like castanets.

She waited another fifteen minutes, then, teeth chattering like castanets, began to walk back to the school.

"Th-thank you, J-John," replied Peggy, whose teeth chattered like castanets, "but 'ow am I t-to d-dry 'em?