To come; to lend. Has he come it; has he lent it? To come over any one; to cheat or over reach him. Coming wench; a forward wench, also a breeding woman.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
See also the definition in Nathan Bailey's 1736 dictionary of canting and thieving slang.
Comb * Coming! So Is ChristmasNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes