Lyrics:

Na!
Your butt is wide, well, mine is too (Na!)
Just watch your mouth or I'll sit on you (Na!)
The word is out, better treat me right (Na!)
'Cause I'm the king of cellulite
Ham on (na!), ham on, ham on whole wheat (na!), all right

Na!
My zippers bust, my buckles break (Na!)
I'm too much man for you to take (Na!)
The pavement cracks when I fall down (Na!)
I've got more chins than Chinatown (Na!)

Well, I've never used a phone booth
And I've never seen my toes (Na!)
When I'm goin' to the movies
I take up seven rows

Because I'm fat, I'm fat, shamone, ah!
(Fat, fat, really really fat)
You know I'm fat, I'm fat, you know it, ah!
(Fat, fat, really really fat)
You know I'm fat, I'm fat, come on, you know
(Fat, fat, really really fat)
Don'tcha call me pudgy, portly or stout
Just now tell me once again
Who's fat?

Na, na!
When I walk out to get my mail (Na!)
It measures on the Richter scale (Na!)
Down at the beach I'm a lucky man (Na!)
I'm the only one who gets a tan (Na!)
If I have one more pie à la mode (Na!)
I'm gonna need my own ZIP code (Na!)

When you're only having seconds
I'm a-having twenty-thirds (Na!)
When I go to get my shoes shined
I gotta take their word

Because I'm fat, I'm fat, shamone
(Fat, fat, really really fat)
You know I'm fat, I'm fat, you know it, na!
(Fat, fat, really really fat)
You know I'm fat, I'm fat, you know it, you know
(Fat, fat, really really fat)
And my shadow weighs forty-two pounds
Lemme tell you once again
Who's fat?

Na!
If you see me comin' your way
Better give me plenty space (Na!)
If I tell you that I'm hungry
Then won't you feed my face?

Because I'm fat, I'm fat, shamone
(Fat, fat, really really fat)
You know I'm fat, I'm fat, you know it, ah!
(Fat, fat, really really fat)
You know I'm fat, I'm fat, you know it, you know
(Fat, fat, really really fat)
When I sit around the house
(Woo, woo, woo)
I really sit around the house

You know I'm fat, I'm fat, shamone, ah!
(fat, fat, really really fat)
You know I'm fat, I'm fat, you know it, you know it
(Fat, fat, really really fat)
You know, you know, you know, come on
(Fat, fat, really really fat)
And you know all by myself I'm a crowd
Lemme tell you once again

You know I'm huge, I'm fat, you know it, ah!
(Fat, fat, really really fat)
You know I'm fat, you know, hoo
(Fat, fat, really really fat)
You know I'm fat, I'm fat, you know it, you know
(Fat, fat, really really fat)
And the whole world knows I'm fat and I'm proud
Just a-tell me once again
Who's fat?