Nonny ACTUALLY means "Silly fellow" btw!! :D "Silly fellow no" is what he is saying. ANd it is a specific style of music that uses this (Big Band types). I think it is hilarious that he is saying silly fellow!
thats exactly what it is. its a once upon a matress referance. in that musical its just the way she is singing "hey nonny nonny nonny is it you? hey nonny nonny nonny no... " . The word nonny itself I think has been used since medival times.
they didnt put it on their so so the people who listened who listened to the soundtrack first then saw the show would be suprised :) but the show closed Jan. 3rd.... so... :(