What does supercalifragilisticexpealidocious mean?

does anyone actually know what supercalifragilisticexpealidocious means?

Actually, it is not a real word, but the Movie/Musical, Mary Poppins made it a popular phrase. In the dictionary, it is described as:

Part of Speech: adjective
Definition: a nonsense word meaning fantastic; also called supercalifragilistic
Etymology: popularized by the movie 'Mary Poppins'
(used as a nonsense word by children to express approval or to represent the longest word in English.)

glad to help

It means anything you want it to mean

wow. aight. that works.

I found it in a dictionary once. it means fantastic.