Lyrics:

It's... supercalifragilisticexpialidocious
Even though the sound of it is something quite atrocious
If you say it loud enough, you'll always sound precocious:
Supercalifragilisticexpialidocious
Um diddle diddle diddle, um diddle ay
Um diddle diddle diddle, um diddle ay
Um diddle diddle diddle, um diddle ay
Um diddle diddle diddle, um diddle ay

Because I was afraid to speak when I was just a lad
Me father gave me nose a tweak and told me I was bad
But then, one day, I learned a word that saved me achin' nose

The biggest word you ever heard, and this is how it goes:
Oh, supercalifragilisticexpialidocious
Even though the sound of it is something quite atrocious
If you say it loud enough, you'll always sound precocious
Supercalifragilisticexpialidocious
Um diddle diddle diddle, um diddle ay
Um diddle diddle diddle, um diddle ay
Um diddle diddle diddle, um diddle ay
Um diddle diddle diddle, um diddle ay

He traveled all around the world and everywhere he went
He'd use his word, and all would say, 'There goes a clever gent!'

When Dukes or Maharajas pass the time of day with me
I say me special word, and then they ask me out to tea

Oh, supercalifragilisticexpialidocious
Even though the sound of it is something quite atrocious
If you say it loud enough, you'll always sound precocious
Supercalifragilisticexpialidocious
Um diddle diddle diddle, um diddle ay!
Um diddle diddle diddle, um diddle ay!
Um diddle diddle diddle, um diddle ay!
Um diddle diddle diddle, um diddle ay!

You know you can say it backwards, which is 'dociousaliexpilisticfragicalirupus'... but that's going a bit too far, don't you think?

Indubitably!

So when the cat has got your tongue, there's no need for dismay
Just summon up this word, and then you've got a lot to say
But better use it carefully, or it could change your life

For example...

Yes?

One night I said it to me girl, and now me girl's my wife
Oh, and a lovely thing she is, too

She's....
Supercalifragilisticexpialidocious
Supercalifragilisticexpialidocious
Supercalifragilisticexpialidocious
Supercalifragilisticexpialidocious