An out-of-the-way old-fashioned dress, or rather a loose kind of dress, denoting a courtesan.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Nug * Nugging-houseNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes