From column formation: Do a Triple Scoot (those facing on the diagonal do a Turn Thru into adjacent spot and those facing out Flip into adjacent vacated spot). All now face adjacent dancer and Slide Thru. Finishes in eight chain thru, Trade By, double pass thru, completed double pass thru formations (or columns with various other facings depending on the sexes facing for the Slide Thru).
Gus Greene 1973
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.