This song, from the original CD release of INVISIBLE MEN (which is the one I have), definitely stands out to me as being different from the rest of the album. IMO this is by far the best track on that release to be sung by Richard Scott.
Anyway, I finally got around to looking up what the "Tater Dhu" is. At least the lyrics printed in the CD booklet give the correct spelling; it seems that all the lyrics that can be found online spell it "tatterdoo"!