Green’s Dictionary of Slang

1. the vagina.

1611		Middleton No Wit or Help like a Womans (1657) I ii: The Widow’s Notch shall lie open to you.
1656		‘On the Praise of Fat Men’ in Wardroper (1969) 215: In winter morning you might catch— / Her hand on cod, he fingering notch.
1660		Select Quaeries 2 10: [Whether] the Barber miss’d the Wenches Rump out of love to her Notch, or respect of saving charges in the Law.
c.1720		‘The Turnep Ground’ in Farmer Merry Songs and Ballads (1897) I 224: Zounds, Landlords, send but in your Wifes, / We’ll scow’r off all their Notches.
1765		H. Howard Choice Spirits Museum 91: There’s Ned of York [...] Who hates the Scotch, And loves a N---h.
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
a.1790		H.T. Potter New Dict. Cant (1795).
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1837–8		‘The Mouthful’ in Cuckold’s Nest 13: A lecherous old foggy, who lived very near, / [...] He’d not tasted knotch for ten years, you must know.
1841		‘The Shitten End Of A Brick’ in Gentleman’s Spicey Songster 46: She wouldn’t let him have a bit of notch, alas, / But when they were in bed, she turn’d to him her ...
1880		‘La Rose d’Amour’ in Pearl 9 Mar. 9: Another was made to hold one [i.e. penis] in her hand, the head just without the lips of her love notch.
1888–94		‘Walter’ My Secret Life (1966) III 451: My hand roved about her bum, belly, and notch.
1896		‘Voluptuous Night’ in Cabinet of Venus 34: Inch by inch of its firm, stiff, nervous substance was uncovered by her receding notch.
c.1900		‘Ramrod’ Nocturnal Meeting 40: Having worked my cock into her still narrow notch [etc].

2. (Aus.) a pocket.

1895

C. Crowe Aus. Sl. Dict. 53: Notch, a pocket.

3. (US, also notch girl) a prostitute or sexually promiscuous woman.

1935		(ref. to 1910) D. Maurer ‘Lingo of the Good People’ AS X:1 18/2: notch or notch girl. A prostitute.
1969		J. Hibberd Dimboola (2000) 81: The most notorious notch in the neighbourhood.
2013		T. Black Ringer [ebook] n.p.: What the losers down the Boneyard would call ‘well worth forty wanks’. What I call a good notch.