jack-knife
Folding pocket blade
A jack-knife is a folding pocket knife with a blade that folds into the handle.
The name extends to anything that bends sharply at a hinge point: a jack-knife dive involves bending at the waist to touch your toes before straightening.
When a truck jack-knifes, the cab and trailer fold toward each other at a sharp angle, usually during a skid: The rig jack-knifed on the icy highway.
Vehicle flipping accident
- skidUncontrolled lateral slide
- semi-truckCab with detachable cargo trailer
- eighteen-wheelerLarge cargo transport vehicle
- articulatedHaving segments that bend
highway · brake · fishtail · hazard · pileup · freeway · trucker · haulage
Bending something over itself
- switchbladeSpring-released folding knife
- multi-toolPortable combined implement set
- claspSecuring device that clicks
- hingeMovable connecting joint
handle · lock · snap · sharp · steel · EDC · whittling · camping
Long battlefield spear
- tuckFold into concealment
- platformRaised flat structure
- springboardFlexible platform for jumping
- somersaultFull-body forward rotation
plunge · twist · diver · poolside · synchronized · aquatics · diving-board · entry
rollover
Vehicle flipping accident
- skidUncontrolled lateral slide
- semi-truckCab with detachable cargo trailer
- eighteen-wheelerLarge cargo transport vehicle
articulated · highway · brake · fishtail · hazard · pileup · freeway · trucker · haulage · tractor-trailer
folding
Bending something over itself
- switchbladeSpring-released folding knife
- multi-toolPortable combined implement set
- claspSecuring device that clicks
hinge · handle · lock · snap · sharp · steel · EDC · whittling · camping · utility
pike
Long battlefield spear
- tuckFold into concealment
- platformRaised flat structure
- springboardFlexible platform for jumping
somersault · plunge · twist · diver · poolside · synchronized · aquatics · diving-board · entry · splash
crunch
Crushing, grinding noise
core · fitness · mat · bodyweight · pilates · gymnastics · tuck · fold · stretch · flexibility
jack-knifefixed blade
Knife without hinge mechanism
sheath knife · hunting knife · dagger · combat knife · machete
jack-knifestraighten
Make linear or orderly
extend · unfold · stretch out · align · streamline
jack-knifelayout
Spatial arrangement of elements
pencil dive · tuck · pike · cannonball · belly flop