Definition of Charley horse

1. Least Effective Exercises Slideshow
2. Dehydration Slideshow
3. First Aid Care and Pain Relief for Minor Injuries

Charley horse: Slang for a cramp in a muscle in the leg, usually caused by a strain or injury. A charley horse can last anywhere from a few seconds to over a quarter of an hour. It is not uncommon for one to recur before it finally resolves.