Rum RIGGING,
fine Cloaths. The Cull has Rum Rigging, let's ding him, mill him, and pike; The Man has very good Cloaths, let us knock him down, kill him, and scour off.
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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).