Cheats who ply in different parts of the town, particularly about Water-lane, opposite St. Clement’s church, in the Strand, and pretend to deal in smuggled goods, stopping all country people, or such as they think they can impose on; which they frequently do, by selling them Spital-fields goods at double their current price.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Duds * DugsNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes