whip·lash noun \ˈhwip-ˌlash, ˈwip-\
: injury resulting from a sudden sharp whipping movement of the neck and head (as of a person in a vehicle that is struck head-on or from the rear by another vehicle)
Seen & Heard
What made you want to look up whiplash? Please tell us where you read or heard it (including the quote, if possible).