Longman Dictionary of Contemporary English homepage

jack-knife

2 verb
     
Related topics: Motor Vehicles
jack-knife2 [intransitive]
TTC if a large vehicle with two parts jack-knifes, it slides out of control and the back part swings towards the front part:
The truck skidded on the ice and jack-knifed.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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