Actually dug out an old Chris Barber album - Its credited to Spencer Williams , and Ottilie Pattersons vocal is :-

C                  A7
You're so ugly , You're so ugly child
D7            G7   C
You're some ugly child
E7                                 G7   
Now the clothes that you wear are not in style
D7                      G      
You look like an ape everytime you smile
C                   A7
How I hate you , you alligator bait you
D7
The homeliest thing I ever saw
             F
Oh you're knockkneed pigeon toed and box ankled too
            C             E7            A7
There's a curse on your family and it fell on you
       C                A7
You're hair is nappy , Whose your Pappy ?
D7       G7    C
Your some ugly child


The vocal then repeats after some instrumental with a different last couplet :-

Your hair is yellow , whose your Fellow

You're some ugly child


And I am NOT guaranteeing the accuracy of the chord run - A Jazz Guitarist I definately aint , but they are adjacent to the tune as I know it.