la-di-da

Which Means:

Pretending to be elegant, fancy, or rich.

As In:

Linus was so la-di-da that he liked to light his cigar with a one hundred dollar bill!

Heads Up!

You will hear this word more often as an interjection used when people are sarcastic about how fancy or special something is: "Well, la-di-da! You bought five new dresses!"