It was the tune Mother used to whistle through her teeth, all right.
She sucked in air, letting it whistle through her teeth.
Looking the other way, he started whistling through his teeth.
He whistled through his teeth and the other horses came racing over.
He might even have whistled to himself, through his teeth, thinly.
He heard Maria start to whistle through her teeth, and guessed she was thinking the same thing.
The man looked us over again, frowning to himself, and whistling through his teeth.
The lieutenant saw the cash and whistled through his teeth.
I whistle long and low through my two front teeth.
He turned back to look at me and whistled through his teeth.