I have been looking that up, Sire, and I find that “Diddums wasms” is not unacceptable in the earlier stages of conversation with little Royal Highnesses!
The King.
[As if learning a lesson.] Diddums wasms! Wasms Diddums! I never shall remember that!
The Chancellor.
How about simple Duckums, or Ooo-galloo-galloo?
The King.
[Experiments with these.] That’s better. [He turns again to the group.] Now what shall we do to celebrate this joyful occasion? Suppose I go a-hunting and bring in a pretty spotted leopard, a great, big, huggy bear, or a gaudy tiger with orange stripes to play with the little one!
The Chancellor.
The usual thing, Sire, is to hold a feast ... a christening feast!
The Queen.