CLOAK-TWITCHERS,
Villains who lurk in by and dark Places, to snatch them off the Wearer's Shoulders.
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Entry taken from 1736 Canting Dictionary, by Nathan Bailey.
Cloak Twitchers in the 1811 Vulgar Tongue
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).