From a squared set: Heads Square Thru, California Twirl and Substitute. Sides (in the center) Square Thru as the heads divide and Star Thru. Sides finish the Square Thru and do a California Twirl and Substitute. Continue until the caller uses his favorite get-out.
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.