Tuned one whole step down:
DGCFAD

C                  G
Are you feeling lethargic
Am                    F         Fm
Have you considered a cleansing Colonic?
C                     Am7
We all get clogged up now and again
F                   G
It's time to take a trip to the fountain.

D
Fountain of Health
Du Du Do Do Ru
C
Fountain of Health
Du Du Do Do Ru

G                       C              D
Spread those cheeks and get your colon clean

______________

This is just a rough version for the guitar, there are lots of other changes going on 
since it`s piano, but it can sound as close to the original song to make your friends 
laugh!  Thanks for checking out my chords!