A woman or wench; also a yeoman’s daughter. To be taken all-a mort; to be confounded, surprised, or motionless through fear.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Morris * MosesNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes