From double pass thru, Trade By or one quarter tag formation: Centers (or those in the center wave) Fan the Top then arm turn 3/4 as the outside couples Quarter In, Out, Right or Left as directed and Circulate two positions. Finishes in a number of oddball T-Bone formations.
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.