The venereal disease, said to have been imported from France. French gout; the same. He suffered by a blow over the snout with a French faggot-stick; i.e. he lost his nose by the pox.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
French Cream * French LeaveNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes