The technical sailing term for the situation when a person steers a boat too far in one direction, causing the wind to pressure the sails into turning in a circle. At this point, the only thing to do is allow the wind to propel the boat in almost a 360 to get back on course.
"Dude, so we went sailing yesterday out from Redondo, and we ended up pulling a rach not one, but two times! It was slightly dizzying but also hysterical!"
by rach BFD May 03, 2008