Hmmm, I've heard this a bit differently, Dave. Same words basically, except that the "Do me amma ding me amma do me amma day" being referred to in a posessive manner;

It's down comes the lady to let old Jack in with his do me amma etc.

Behold his hopes are all dashed to the ground like his do me amma etc.

For I never will part from my Jolly Jack tar and his do me amma etc.

Sorry I couldn't begin to extract the chords. Maybe if I find a midi I can convert it to notation.... I'll give it a try. Margo