This is when a woman is riding a man, turned around facing his feet.  Just when the man is about to splooge, the woman punches him square in the nuts.
Jill:  I was riding Jack last night and gave him a good old fashioned ball squash because he spent so much time playing fantasy football.
by Seth Sirover January 12, 2008
 Get the Ball Squashmug.
Get the Ball Squashmug.