A squinting man or woman; said to be born in the middle of the week, and looking both ways for Sunday; or born in a hackney coach, and looking out of both windows; fit for a cook, one eye in the pot, and the other up the chimney; looking nine ways at once.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Squib * Squire of AlsatiaNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes