A mulatto; or any one who has, as the West-Indian term is, a lick of the tar-brush, that is, some negro blood in him.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Ding Dong * Dining Room PostNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes