charley horse

noun2

1. •
   (informal) A punch in the thigh.

   • I knew to just keep my mouth shut about it — unless I wanted the word "dummy" to be followed by a charley horse. — 2006
2. •
   (US) Synonym of cramp, a painful involuntary muscle contraction, particularly a strong cramp in the torso, arms, or legs.

   • Of course there had been plenty of bruises—one mild case of charley-horse, several dislocated or sprained fingers, a wrenched ankle or two and any number of cuts and scrapes, […] — 1914