The front-dive pike, in which the body folds and unfolds.
It took me hundreds of dives to master even the simple jackknife.
(statistics) Alternative spelling of jackknife.
To fold in the middle, as a jackknife does.
The cat jackknifed in the air and landed gracefully on its feet.
(colloquial) 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 like nobody's business.
Before I knew what was happening, I'd jack-knifed.
Other Word Forms of Jack-knife
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