In addition to the use of the same melody by the German anthem, the British anthem and the American hymn, there is a popular German nonsense text sung to the melody:
Braunschweiger Leberwurst, (3x)
Braunschweiger Wurst!
(Repeat)
For the nonsensical effect, it must be sung very solemnly and sincerely. (The meaning, of course, is just "Braunschweig liver sausage."
hymn of the german Kaisers, sung to the same tune as the anthem of Great Britain.