A move in tumbling and vaulting involving a kip action from a balance on the hands, back of the neck, and shoulders, and a spring off the hands to a standing position.
Origin
1930s.
Definition of neckspring in US English:
neckspring
noun
A move in tumbling and vaulting involving a kip action from a balance on the hands, back of the neck, and shoulders, and a spring off the hands to a standing position.