1736 Canting Dictionary / C / CLANK NAPPER [rogue]
a Silver-tankard Stealer. See Rumbubber.
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Entry taken from 1736 Canting Dictionary, by Nathan Bailey.
Clank Napper in the 1811 Vulgar Tongue
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).
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