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Jackknife may refer to:

  • Pocket knife or jackknife, a compact, foldable knife
  • Jackknifing, a type of crash with articulated vehicle combinations

Film and television[edit]

  • Jacknife, a 1989 American film by David Jones
  • "Jack Knife", an episode of NCIS
  • Jackknife, a character on Superjail!

Athletics and sports[edit]

Other uses[edit]

See also[edit]