This is the correct spelling of "Supercalifragilisticexpialidocious".

The story behind the answer

True—the spelling matches the 34-letter word popularized by the 1964 Disney film Mary Poppins, where “Supercalifragilisticexpialidocious” is sung as a joyful, whimsical term meaning something extraordinarily good (or something to say when you have nothing to say). It’s often misspelled with extra a’s or o’s, but the correct middle is expiali-, not expiala- or expialo-.

To remember it, chunk it by syllables: super-cali-fragi-listic-expi-ali-docious. Think “fragile” without the final e (fragi), then “listic,” followed by “expi-ali-,” and finish with “docious” (like “delicious” without “deli”). Although famously long, it isn’t the longest English word, which helps frame it as a playful creation rather than a technical term.