Don't know about the rest of you, but the first I ever heard "flibbertigibbet" was in the lyrics of "Maria" from The Sound of Music. This musical, along with Mary Poppins, is one from which I can sing nearly all the songs, having come along at an age in my life when one bought the records and played them over and over. The toughest one to learn was "The Lonely Goatherd". Anyhoo, I have used "flibbertigibbet" throughout my life on occasion, whenever the fancy strikes. It's a great word! :0)