E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Da’vy’s Sow.
Drunk as Davy’s sow. Grose says: One David Lloyd, a Welshman, who kept an ale-house at Hereford, had a sow with six legs, which was an object of great curiosity. One day David’s wife, having indulged too freely, lay down in the sty to sleep, and a company coming to see the sow, David led them to the sty, saying, as usual, “There is a sow for you! Did you ever see the like?” One of the visitors replied, “Well, it is the drunkenest sow I ever beheld.” Whence the woman was ever after called “Davy’s sow.” (Classical Dictionary of the Vulgar Tongue.)
