An abbreviation of housewife, but now always used as a term of reproach; as, How now, hussy? or She is a light hussy.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Huskylour * HuzzaNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes