Fawney Rig (Grose 1811 Dictionary)
A common fraud, thus practised: A fellow
drops a brass ring, double gilt, which he picks up before
the party meant to be cheated, and to whom he disposes
of it for less than its supposed, and ten times more than
its real, value. See Money Dropper.
Definition taken from
The 1811 Dictionary of the Vulgar Tongue,
originally by Francis Grose.
Faytors * Fawney
1736 Dictionary of canting and thieving slang
John S. Farmer's collection
canting songs and slang rhymes