supercalifragilisticexpialadocious Share definition Flag Something quite atrocious; Exuberant; joyful; too much for words; "AHH!"; exciting. Ahhhhh supercalifragilisticexpialadocious dude! supercalifragilisticexpialadocious by some kid named mike April 20, 2005 0 0 Get merch Get the supercalifragilisticexpialadocious mug. Buy Now — $32.95 See more merch