A one-eyed man or woman, each having a right side and a left side, a fore side and a back side, an outside, an inside, and a blind side.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
To Settle * ShabbaroonNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes