A sexual position where one partner inserts his penis into the ass of another partner, male or female, then spins himself clockwise using only his penis as a pivot.
Tracy and I did the japanese helicopter all night long.
by EigthOrderBandpass October 23, 2008
The rapid hand movement, and squinting eyes associated with the final moments of Taking matters into your own hands
by Middle House Chuckles February 10, 2009