Green’s Dictionary of Slang

(UK Und.) a thief who works after dark; cit. 1791 suggests the goods taken rather than the thief (cf. night sneak under night n.).

1777		J. Fielding Thieving Detected 24: The evening sneak steals out when the daylight begins to disappear.
1781		G. Parker View of Society II 76: Morning Sneak is a fellow who watches the maid servants in houses when they open parlour-windows [...] and take the first thing they can lay their hands on. [Ibid.] 77: Evening Sneaks are fellows who are on the same lay, and use the same means, but their time of performing it is in the evening.
1791		‘Flash Lang.’ in Confessions of Thomas Mount 19: The evening or morning sneak, goods taken early in the morning or late in the evening.
1796		Grose Classical Dict. of the Vulgar Tongue (3rd edn).
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.

the female genitalia.

2000–02		Amatory Ink 🌐.
2000		Sex-Lexis 🌐.

false news, rumours.

1909

J. Ware Passing Eng. of the Victorian Era.

(US) a prostitute.

1938		Pittsburgh Courier (PA) 17 Dec. 11/1: Those ofay ‘ladies of the evening’ checked out of the Braddock Hotel.
1942		D. Burley N.Y. Amsterdam Star-News 14 Nov. 16: The girls of the evening whose faces are lost in the murk and gloom of darkened doorways hoping against hope.
1944		D. Burley N.Y. Amsterdam News 8 Apr. 8B: The ladies of the evening and the gents of the stroll.
1955		B. Appel Tough Guy [ebook] Ladies of the evening, their rouged cheeks glowing like sunsets, cigarettes in their fingers.
1960		J. Havoc Early Havoc 93: Even the ladies of the evening, who behaved so wildly [were] more attractive.
2001		(con. late 19C) C. Jeffords Shady Ladies of the Old West 🌐 Other names [for prostitutes] were [...] ‘ladies of the evening’, [etc.].
2011		IOL News 4 Dec. 🌐 Durban’s ladies of the night say they are fit nd ready to ‘service’ some of the 30,000 delegates converging on the city.