Green’s Dictionary of Slang

1. a woman who has intercourse while still half-dressed.

1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue n.p.: Dutchess, a woman enjoyed with her pattens on.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.

2. a man who has intercourse without removing his boots; thus make a duchess, to have intercourse in this spontaneous manner.

1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue n.p.: A woman enjoyed [...] by a man in boots, is said to be made a dutchess.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.