Rum-Diddly-Dum-Dum, can be used in sentences to Indicate Boredom, and To Stop the Other Person from Talking.
Well, Thats very Int... " RUM-DIDDLY-DUM-DUM.", Oh, Ok then...
An expression you use when you catch someone lacking
Le Bron James was up to some mischievous acts then Kobe Bryant caught him lacking then said Rum diddly dum dum