n. [Etym. uncert.] A woman; a female. [Cant]

Male gypsies all, not a mort among them. –B. Jonson.

Source: Webster’s Revised Unabridged Dictionary, quoted on Dictionary.com.

The gutter bloods in tattered finery, often arm in arm with their rum morts (she as covered in stained ribbon and torn lace as he), brought their goods to market, as did the govey burners, pocket nippers and a generality of rapscallions living off the scraps and leavings of the ruffler’s trade.

Source: Von Bek, ‘The City in the Autumn Stars’, Michael Moorcock.