From double pass thru formation: Centers arm turn 3/4 by the right. Trailing dancers Quarter In, Pass Thru and move on to the next to "Pair In" as a couple. Inside people now in single file walk out around the outside pairs, leader stepping behind the beau and the trailer stepping behind the belle. New centers now do a Two Ladies Chain Thru. Finishes in double pass thru formation.
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.