To WHIP off,
to steal, to drink cleverly, to snatch and to run away. Whipt through the Lungs; Run through the Body with a Sword. Whipt in at the Glaze; Got in at the Window.
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Entry taken from 1736 Canting Dictionary, by Nathan Bailey.
To Whip Off in the 1811 Vulgar Tongue
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).