Does the word super cala frajalistic expi ala docious exist?

No, the word "supercalifragilisticexpialidocious" does not exist in the English language in the way you might think.

It's a made-up word from the movie Mary Poppins, created by the songwriters Richard M. Sherman and Robert B. Sherman.

The word itself has no real definition, but it's used to describe something wonderful, fantastic, or incredible.