SETTERS, or Setting-dogs,
they that draw in Bubbles, for old Gamesters to rook; also a Serjeant's Yeoman, or Bailiff's Follower, or Second. Also an Excise Officer.
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Entry taken from 1736 Canting Dictionary, by Nathan Bailey.
The Vulgar Tongue originally collected by Grose, 1811.
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).