monorchid

Monorchid sheep are less fertile than full rams, but have leaner meat than wethers.

One claimed that British intelligence had discovered that Hitler was monorchid and written the song in an attempt to drive him even further round the bend than he was already, with some elaborate theories about how they might have discovered this.

An alleged Soviet autopsy on Hitler's remains made shortly after the war claimed Hitler was monorchid, but some historians dismiss this reference as propaganda, and that the origin of this urban myth comes from the song "Hitler Has Only Got One Ball" which was sung to boost morale by British soldiers.