the lash of a whip.

an abrupt snapping motion or change of direction resembling the lash of a whip.

Also, whiplash injury. a neck injury caused by a sudden jerking backward, forward, or both, of the head

Whiplash resulted when their car was struck from behind.

Also called whiplash curve. a connected series of reverse curves of more or less elliptical form, used as a major design motif in the Art Nouveau style.

to beat, hit, throw, etc., with or as if with a whiplash.

to affect adversely, as by a sudden change

new taxes whiplashing corporate earnings.