Dead-leg

If they did then they kept quiet about it for fear of dead-legs, dead-shoulders, kidney punches, that sort of thing.

Source: wiktionary

They'd given kids a dead-leg: a knee to the side of the thigh.

Source: wiktionary

I would then have to leave it to stealth, and when I did catch them I would give them a couple of dead-legs until they pleaded and promised they wouldn't do it again.

Source: wiktionary

In a WFI system, usually a distilled water loop, warm standing water can occur in dead-legs which are defined as dead-ends more than 5 to 6 pipe widths in length, and which extend downward, either straight or at an angle, from the loop.

Source: wiktionary