What is "whirling dervish"

Usage examples of "whirling dervish".

First it was like you were screaming right in my ear - or inside my head - and then you were like the original whirling Dervish, you were a blur.

Despite the rain of the previous day, the roads had dried out and they moved at the center of a whirling dervish of reddish gray dust.

There was still Valerie in the center of it, like the silent eye of a whirling dervish.

First at a sleek, black dragonfly shape under the gleaming blur of its fan, a shape that blotted the stars in its passing and turned the night to a whirling dervish dust-devil with its downdraught as it sped overhead, then at the torpedo-shapes that tumbled lazily, -end over end, down from its belly like so many elongated eggs.

She became a whirling dervish, a killing machine that ripped and tore, slashed and cut, on and on.