Pickpockets, chiefly young Jews, who ply about the Bank to steal the pocket-books of persons who have just received their dividends there.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
reader * readyNathan Bailey's 1721 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes