ETYM Old Eng. lasche; cf. Dutch lasch piece set in, joint, seam, German lashe latchet, a bit of leather, gusset, stripe, laschen to furnish with flaps, to lash or slap, Icel. laski gusset, flap, laska to break.
The flexible part of a whip; SYN. thong.

An injury to the neck (the cervical vertebrae) resulting from rapid acceleration or deceleration (as in an automobile accident); SYN. whiplash injury.