if you want to know what's the logest work in english is supercalifragilisticexpialidocious
its from some disney movie. when i was a kid my mom used to teased me about it, i didn't believe her cuz i thought she was just making this word up, but its a good word.

ok, what does it mean? the answer is simple. it doesn't really mean anything. its a word used as a nonsense word by children to express approval or to represent the longest word in English