Jackknife

Look up jackknife or jack-knife in Wiktionary, the free dictionary.

A jackknife, or pocket knife, is a compact, foldable knife.

Jackknife may also refer to:

Places

• Jackknife Bascule Bridge, in Thunder Bay, Ontario, Canada

Art, entertainment, and media

Film

• Jacknife (1989), an American film

Television

• Jackknife, a character from the television series Superjail!
• "Jack Knife", an episode of the seventh season of NCIS

Athletics and sports

• Jackknife (exercise), an abdominal exercise
• Jackknife, a kicking move involving 540-degree rotation
• Jackknife, a type of high dive
• Jackknife hold, a pinning move in professional wrestling

Other uses

• Jackknife (statistics), a resampling technique in statistics
• Jackknife clam
• Jackknifing, a complication in vehicular towing
• To fold on itself at an acute angle like a folding pocketknife

See also

• The Jack-Knife Man, a 1920 film