The emptying of a neoessary-hovise, particularly in London. You have been at an Irish wedding, where black eyes are given instead of favours; saying to one who has a black eye.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Weasel-faced * WedgeNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes