Meaning of Huff-Duff

Huff-Duff

Pronunciation: (huf'duf"), [key]
— n.
  1. a method used by the Allies in World War II for locating enemy submarines and other naval or land targets through simultaneous bearings on their radio transmissions.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.