Definition of "slatternly"

Being a light-complexioned woman, she wore light clothes, as most blondes will, and appeared, in preference, in draggled sea-green, or slatternly sky-blue.

1847 January – 1848 July, William Makepeace Thackeray, chapter 9, in Vanity Fair […], London: Bradbury and Evans […], published 1848

The dismal quarter of Soho seen under these changing glimpses, with its muddy ways, and slatternly passengers, and its lamps, which had never been extinguished or had been kindled afresh to combat this mournful reinvasion of darkness, seemed, in the lawyer's eyes, like a district of some city in a nightmare.

1886 January 5, Robert Louis Stevenson, Strange Case of Dr Jekyll and Mr Hyde, London: Longmans, Green, and Co.

Am I alone in feeling smug (if slatternly) about the news that super-clean homes are a breeding ground for infection? Apparently, all that bleach is bad not just for germs but for children's immune systems, too, and paradoxically causes more disease than it prevents.

2015 April 4, Judith Woods, “I knew it! Spring cleaning is bad for your family's health [print version: Vindicated at last! It's healthier to be a slatternly housewife, p. 28]”, in The Daily Telegraph‎, archived from the original on 9 April 2015