Source : Webster's Revised Unabridged Dictionary (1913)

Cuckold's knot \Cuck"old's knot`\ (k?k"?ldz n?t`). (Naut.)
   A hitch or knot, by which a rope is secured to a spar, the
   two parts of the rope being crossed and seized together; --
   called also {cuckold's neck}. --Ham. Nav. Encyc.