A vile, desperate fellow. Persons guilty of murder, or other atrocious crimes, are frequently, after execution, hanged on a gibbet, to which they are fastened by iron bandages; the gibbet is commonly placed on or near the place where the crime was committed.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Hang Gallows Look * Hang It UpNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes