Origin of rub-a-dub
Examples from the Web for rub-a-dub
And away he ran among the trees in search of his pigs, while Eric heard his little drum, and his song of "Rub-a-dub, halloo!"
She did not wish to be interrupted now; she wanted to find Iris to tell her of the sad fate of Rub-a-Dub.
A little French drummer, singing to his rub-a-dub, and the agreeable yell of a dog, complete the vocal performers.
Wolf gave a grunt like one of his pigs, and began his song of "Rub-a-dub."
"That would not be Rub-a-Dub," she said; then she buried her little, fat face on his shoulder and sobs shook her frame.