Definitions for la-di-daˈlɑ diˈdɑ
Random House Webster's College Dictionary
a la-di-da manner.
Origin of la-di-da:
1880–85; imit. of affected speech
grandiose, hifalutin, highfalutin, highfaluting, hoity-toity, la-di-da(adj)
Disdainful description of pretension or haughtiness.
She was all la-di-da, with her nose in the air, and we're all struggling not to laugh because that would be gauche.
Expression of disdain for pretension or haughtiness.
"Well la-di-da, aren't you the impressive personage, with a feather in your hair yet."