Nypper (Grose 1811 Dictionary)

A cut-purse: so called by one Wotton, who in the year 1585 kept an academy for the education and perfection of pickpockets and cut-purses: his school was near Billingsgate, London. As in the dress of ancient times many people wore their purses at their girdles, cutting them was a branch of the light-fingered art, which is now lost, though the name remains. Maitland, from Stow, gives the following account of this Wotton: This man was a gentleman born, and sometime a merchant of good credit, but fallen by time into decay: he kept an alehouse near Smart’s Key, near Billingsgate, afterwards for some misdemeanor put down. He reared up a new trade of life, and in the same house he procured all the cut-purses about the city, to repair to his house; there was a school-house set up to learn young boys to cut purses: two devices were hung up; one was a pocket, and another was a purse; the pocket had in it certain counters, and was hung about with hawks bells, and over the top did hang a little sacring bell. The purse had silver in it; and he that could take out a counter, without noise of any of the bells, was adjudged a judicial NYPPER: according to their terms of art, a FOYSTER was a pick-pocket; a NYPPER was a pick purse, or cut-purse.