Alright, so since no one seems to actually understand the meaning of this word, I will give the definition that Disney gave.
Main Entry: supercalifragilisticexpialidocious
Part of Speech: adjective
Definition: a nonsense word meaning fantastic; also called supercalifragilistic
Etymology: popularized by the movie `Mary Poppins'
Does not mean frustrating, although it can be a bitch to spell. People who use this world on a daily basis are probably insane. Please aproach these people with caution.

When you eat dirt for the first time and leave your family to build a shack in the woods

word too long for use except to confuse 'tards.

this word is an allusion to the movie popular back in the day when we all liked to sing and dance on the rooves of houses, and jump into pictures that we see lying on the side of the street: in simnlest terms it just means nonsense

A word that was used in Mary Poppins. It is a way to annoy parents when repeated over and over constantly. This word means absolutely nothing!

a far too long word that ppl use when they're out of things to say.

v. describing something confusing or frustrating, by giving the confused or frustrated feeling.