What does supercalifragilistic mean?

"Supercalifragilisticexpialidocious" is a made-up word, often used in the movie Mary Poppins, to describe something extraordinary, wonderful, or amazing.

There's no real definition, as it's just a nonsensical word created for its fun sound and playful nature.

It's a great example of how language can be used creatively and for comedic effect!