granny knot 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 knot like a square knot but with the ends crossed the wrong way: it will slip under strain
granny knot definition by American Heritage Dictionary
A knot resembling a square knot but with the second tie crossed incorrectly.
Origin: So called in contempt.