A black-a-moor: figuratively used for a slave. I’ll be no man’s negro; I will be no man’s slave.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Negligee * Negroe’s HeadsNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes