Green’s Dictionary of Slang

the buttocks, the vagina.

1690		D’Urfey Collin’s Walk canto 2 59: To men the Sourse [i.e. water] on the head descends, But th’ women on their nether ends.
a.1749		Robertson of Struan ‘Dutch Industry’ in Poems (1752) 126: At th’ upper End she cracks her Nuts, / While at the nether End her Honour.

the vagina.

1890–1904		Farmer & Henley Sl. and Its Analogues.
2002		rtw132 Maureen’s Lusty Confessions 🌐 I wish that you would poke me in my nether eye with your tummy banana and insist that I was wholly enjoying myself.

the pubic hair.

1890–1904

Farmer & Henley Sl. and Its Analogues V 30/1: The female pudendum [...] nether-eyebrows (whiskers or lashes).

the vagina.

a.1656		‘A Song’ in Ebsworth Merry Drollery Compleat (1875) 301: Her neather Lip moyst, plump, and fair, / Millions of kisses crown’d.
1890–1904		Farmer & Henley Sl. and Its Analogues.

the vagina.

1748–49

Cleland Memoirs of a Woman of Pleasure (1985) 82: That delicate glutton, my neither-mouth [sic], as full as it could hold, kept palating, with exquistite relish, the morsel that so deliciously ingorg’d it.