Charley Horse versus Charlie Horse

What is the Difference Between Charley Horse and Charlie Horse?

When to Use Charley Horse

Charley horse is a North American colloquial name for a muscle cramp in the leg.

In other regions, the local term translates to other strange names, like paralyzer (Portugal), water buffalo (central Italy), donkey bite (southern Italy), and old woman (northwestern Italy). One might surmise that Italians experience altogether more of these injuries than people in other nations.

The medical term is simply muscle cramp.

At any rate, here are a few examples of charley horse in a sentence: