The variant on Dave's that I learned is...

John Jacob Jingle Heimer Smith,
That's my name, 2, 4, 6, 8
Whenever I go out,
The People always shout:
There goes John Jacob Jingle Heimer Smith.
Ta ra ra ra ra ra ra.
(repeat...indefinitely)

And my daughter's variant on in ichMael's...

I know a song that gets on everybody's nerves,
I know a song that gets on everybody's nerves,
I know a song that gets on everybody's nerves,
And I can sing it 'cause I know all the words.
(repeat...indefinitely, or at least for the duration of the car ride)