A complete rogue, one that has sung in different choirs or cages, i.e. gaols. Cant.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Quipps * Quirks and QuilletsNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes