From a one quarter tag formation: Ends of the wave walk forward around behind the outside couples. Center two in the wave step thru and with the facing outside person do a Pass Thru. Center three pairs Trade. Outside persons and the center two now move up to nearest ends of a wave. Finishes in parallel wave formation.
Ed Tice 1975
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.