A cheat, who pretends by his skill in astrology to assist persons in recovering stolen goods: and also to tell them their fortunes, and when, how often, and to whom they shall be married; likewise answers all lawful questions, both by sea and land. This profession is frequently occupied by ladies.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Cunningham * Cunning ShaverNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes