La-di-da

From Fresh Dictionary

English

Adjective

1. 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.

Interjection

1. Expression of disdain for pretension or haughtiness.

   "Well la-di-da, aren't you the impressive personage, with a feather in your hair yet."