From facing couples: Half Square Thru, U-turn back and box the gnat, pull by and quarter in. Left Half Square Thru, U-turn back and swat the flea, pull by and quarter in. Half Square Thru, U-turn back and box the gnat, pull by and quarter in. Left Half Square Thru, U-turn back and swat the flea, pull by to take the next call.
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.