(Britain, Ireland): A leg that is painfully numbed, stiffened, or cramped by impact such as by a deliberate or accidental kick or other blow.

Known as a charley horse or charlie horse in the United States where it can also mean a blow to the arm, often given during horseplay.

its where you smash somebody in the leg really hard and there leg goes like numb, and they have trouble moving it because you just smashed it.

A painful swelling, normally in the thigh, caused by a punch or quick blow. Bruising and discoloration tend to follow dead legs and leave the victim with a numb leg that is hard to walk on. Normally occurs between guys but rare instances of girls giving guys dead legs have been discovered. Also known as a Charlie Horse.