Webster's Revised Unabridged Dictionary · 1913

Whiplash

Whiplash , noun

1.
The lash of a whip, -- usually made of thongs of leather, or of cords, braided or twisted.
2.
a sudden change of direction, resembling the motion of the tip of a whip when it is cracked.
3.
a stinging psychological effect reminiscent of being stung by a whip.