<p><strong>Noun</strong></p><ul><li>the lash of a whip.</li><li>an abrupt snapping motion or change of direction resembling the lash of a whip.</li><li>Also whip·lash injury: a neck injury caused by a sudden jerking backward, forward, or both, of the head.</li><li>Whiplash resulted when their car was struck from behind.</li><li>Also called whip·lash curve: a connected series of reverse curves of more or less elliptical form, used as a major design motif in the Art Nouveau style.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) to beat, hit, throw, etc., with or as if with a whiplash.</li><li>to affect adversely, as by a sudden change: new taxes whiplashing corporate earnings.</li></ul>