Green’s Dictionary of Slang

(UK Und.) one who leaves goods at a house in the country or a small town and borrows money on them, pretending that they have been made in London, i.e. that they are valuable.

1753		J. Poulter Discoveries (1774) 42: I am a Locker, and Dudder, [...] I leave Goods at a House, and borrow Money on them, pretending they are Rum Goods, Goods made in London.
1786		Whole Art of Thieving [as cit. 1753].