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1.
A sudden, abrupt, or spontaneous contraction of a muscle causing extreme pain persisting for a duration ranging from seconds to minutes resulting in residual discomfort and soreness in that muscle.
In the middle of the night I stretched my leg and got a Charlie Horse in my calf.
by Jay Parker August 04, 2006
 
2.
A leg cramp that usually occurs when you're sleeping, which causes so much pain you wake up and scream cusswords loudly.
Fuck, shit, bitch, goddamn charlie horse!!
by SiERRRRRA May 30, 2007
 
3.
Leg Cramps or Muscle Cramps
When a cramp occurs, the muscle locks in the contracted position (Charlie Horse)
by alla July 04, 2003
 
4.
or Charley Horse

A stiff and painful cramp in a muscle.
Ow ow ow, damn Charlie Horses.
by Light Joker September 03, 2004
 
5.
Usually due to a lack of potassium, it's when your leg tightens up, causing an extremely painful sensation. Immediatley after it's over, your leg feels really good, though.
Charlie Horse! Charlie Horse! Someone get me a bananna!
by Anne Stone September 26, 2009
 
6.
when someone hits you in the leg with a nuckle causing a very painful cramp
hey you know what a charlie horse is... let me show ya
by nathanael tompkins February 10, 2008
 
7.
a horse named Charlie, had his leg spazz out, so every time someones leg spazzed people called it a Charlie Horse. Charlie was the laughing stock so he became a rogue horse.
Rob Horse: "Woh Sarah your leg is spazzing out like crazy!"
Sarah Horse: Guess I've got a Charlie Horse."
by awesome-satay March 10, 2011