JACKKNIFED — Definition of JACKKNIFED
verb
1
To fold in the middle, as a jackknife does.
The cat jackknifed in the air and landed gracefully on its feet.
2
To cause a semi-trailer truck to fold like a jackknife in a traffic accident.
Before I knew what was happening, I'd jack-knifed the truck.
📚 Source: en.wiktionary.org/wiki/jack-knife
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