dead leg

Short definition from Wiktionary

Noun

1. 1
   A blow to the upper thigh, crushing the muscle against the bone and crushing the nerve cluster next to the quadriceps. Also, the resulting injury.
2. 2
   Alternative form of deadleg (isolated section of pipe with no outflow).
3. 3
   Used other than figuratively or idiomatically: see dead, leg.
4. 4
   Alternative form of dead leg (blow to the upper thigh)
5. 5
   Alternative form of deadleg (pipe with no outflow)
6. 6
   Alternative form of deadleg (movement with hips and knees held stiff and straight)