The script says it all

supercalifragilisticexpialidocious.sh

say_command=$1
if [ -z "$say_command" ]; then
  say_command="say"
fi

$say_command "
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 and Maharajahs
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

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 (here here)
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 me wife
Oh, and a lovely thing she is too

She's, supercalifragilisticexpialidocious
Supercalifragilisticexpialidocious
Supercalifragilisticexpialidocious
Supercalifragilisticexpialidocious
"