The expression is predominantly at home in the Southwestern United States.
A Kokopelli is a symbol, a mythic figure found in drawings and carvings (Petroglyphs) in many cave dwellings of ancient indians in the area, e.g. the Anasazi. Most of the times the Kokopelli is shown playing a flute. Historians assume that the the Kokopelli was and is a symbol of good fortune, creativity and performing arts, that it has protecting power and reflects in general the power of nature (e.g. a symbol for rain and fertility) and the creative mind of humans.
The first representations of the symbol date back to 200 B.C..
Today Kokopellis are sold in a variety of styles and sizes in most souvenier shops in the Southwest.