To NAP,
by cheating with the Dice to ecure one chance; also a Clap or Pox, and a short sleep, Nap the Wiper, steal the Hankerchief. You have napt it, You are Clapt.
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Entry taken from 1736 Canting Dictionary, by Nathan Bailey.
To Nap in the 1811 Vulgar Tongue
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).