What does it MEAN??

[7rider]

That's TOTALLY what I thought it meant! I always took it as an expression of humility. Honestly!

I figured the aint was aunt, but thought doody was some form of her name.
I had an aunt, Josephine, who's name my eldest cousin could not say when he was a child. He tried to say "Jo Jo", but it came out "Dodo". So she was always Aunt Dodo to all of us. She wasn't a flightless bird, certainly not an idiot. So...Dodo...Doody. Whatever!