What is the meaning of Jack-knife?
The front-dive pike, in which the body folds and unfolds.
A semi-trailer truck accident in which the vehicle mimics the closing of a jack-knife.
Alternative spelling of jackknife
To fold in the middle, as a jackknife does.
To cause a semi-trailer truck to fold like a jackknife in a traffic accident.
Source: wiktionary.orgSearch words containing