From eight chain thru formation with regular couples: Box the Gnat, change girls (Quarter In) and Swat the Flea, change hands and Turn Thru, then Bend the Line and Slide Thru. Finishes in eight chain thru formation. (If couples are half sashayed at the start, finishes in Trade By formation).
"Diamond" Jim Young 1973
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.