PRIGGERS of Prancers,
Horse-stealers, who carry a Bridle in their Pockets, and a small pad Saddle in their Breeches.
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Entry taken from 1736 Canting Dictionary, by Nathan Bailey.
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The Vulgar Tongue originally collected by Grose, 1811.
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).