There was also a recent thread prompted by someone else asking what the nonsense words such as 'whack fol the daddy-o'...I think the question was about 'musha ring dum a do...'(?) In summation, most people said they were nonsense, but we had some interesting ideas of the origin of such choruses. Incidentally, perhaps 'musha' does come from Gaelic - 'muise', 'indeed'; the sound is practically the same.