As best I can remember, which is none too good, it starts out:

I wonder why nobody don' like me?
Or is it de fact dat I'm ugly?
I wonder why nobody don' like me?
Or is it de fact dat I'm ugly?
(Then four lines to the effect that even his children make fun of him in spite of what their mother says.)

Chorus:
"Mama, look 'ta boo-boo," dey shout;
Deir mama tell dem, "Shut up you mout',
Dat is you daddy." "Oh, no!
My daddy can't be ugly so!"
"Shut you mout', go away." "Mama look 'ta boo-boo dey."
"Shut you mout', go away." "Mama look 'ta boo-boo dey."

I've tried to remember the rest of it, but it's been too long. Maybe this start will help Rechal figure out the other verses.