Tuned one whole step down:
DGCFAD

C5                  G5
Are you feeling lethargic
A5                    F5         F5
Have you considered a cleansing Colonic?
C5                     A5
We all get clogged up now and again
F5                   G5
It's time to take a trip to the fountain.

D5
Fountain of Health
Du Du Do Do Ru
C5
Fountain of Health
Du Du Do Do Ru

G5                       C5              D5
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!