From Longman Dictionary of Contemporary Englishwhiplashwhip‧lash /ˈwɪp-læʃ/ noun [uncountable] MITTCa neck injury caused when your head moves forward and back again suddenly and violently, especially in a car accident One officer suffered whiplash injuries.
Examples from the Corpus
whiplash• Newish Cavalier, base model, with a whiplash radio aerial.• Those taken to hospital were suffering from neck injuries caused by whiplash.• Possible head injury, maybe whiplash - he's unconscious at the moment.• If I took any of this particularly seriously I would risk suffering from nutritional whiplash, pursuing health in precisely contradictory binges.• Since then, my head has snapped back fast enough to get a serious case of whiplash.• I suffered whiplash and was shaken up. 