From parallel waves: Those facing in do a Scoot Back. Those facing out turn to face each other (Quarter In) and Slide Thru. Finishes in various formations depending on the sex pairings for the Slide Thru. (May be waves, lines or three and one lines.)
Nonie Moglia 1975
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.