flutter kick definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a swimming kick in which the legs are moved up and down in short, rapid, steady strokes
flutter kick definition by American Heritage Dictionary
A swimming kick used in crawl and backstroke in which the legs are extended straight back and alternately moved up and down with a slight bend in the knee on the upward movement.