SCANDAL-Proof,
a thorough-pac'd Alsatian, or Minter; one harden'd, or past Shame.
a thorough-pac'd Alsatian, or Minter; one harden'd, or past Shame.
Entry taken from 1736 Canting Dictionary, by Nathan Bailey.
Scandal Proof in the 1811 Vulgar Tongue
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).