look up any word, like sweetest day:
 
1.
who cares. so what??
well la-di-fickin-da.
by nadia October 13, 2003
 
2.
*derived from the "Saturday Night Live" character Matt Foley (a motivational speaker), played by the late Chris Farley.
"Well, la-di-frickin-da!"
by Krystal Meth March 14, 2005
 
3.
ostentatious.
Especially used when there seems to be a quick change made from casual to ostentatious.
Well, we could have been well fed at Sizzler and drinking cold beer at the pub across the road, if you hadn't become so la-di-frickin-da all of a sudden.
by lukeod May 20, 2005