Jackknife
Look up jackknife or jack-knife in Wiktionary, the free dictionary.
Jackknife may refer to:
- Pocketknife or jackknife, a compact, foldable knife
 - Jackknife Bar, Portland, Oregon, U.S.
 - Jackknifing, a type of crash with articulated vehicle combinations
 
Film and television
- Jacknife, a 1989 American film by David Jones
 - "Jack Knife", an episode of NCIS
 - Jackknife, a character on Superjail!
 
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, common name for several species of bivalve mollusc
 
See also
- Jackknife Bascule Bridge, a bridge in Thunder Bay, Ontario, Canada
 - The Jack-Knife Man, a 1920 film