Green’s Dictionary of Slang

salt n.¹

sexual intercourse.

c.1673

Rochester ‘A Ramble in St. James’s Park’ in Works (1757) I 16: So a proud Bitch does lead about / Of humble Curs the Amo’rous Rout, / Who most obsequiously hunt / The sav’ry Scent of Salt-swoln Cunt.

In compounds

salt-bitch (n.) [SE salt bitch, a bitch in heat]

a homosexual.

1686

‘Court Diversion’ in Wilson Court Satires of the Restoration (1976) 150: In France he was the Town and Court’s salt-bitch; / Each page and footman knew him by his breech; / Till of both sides and tongue he was so free, / H’was banished Sodom for debauchery.

salt-cellar (n.)

the vagina.

1890–1904

Farmer & Henley Sl. and Its Analogues.

salt-cunted (adj.) [cunt n. (1)]

sexually voracious.

1888–94

‘Walter’ My Secret Life (1966) X 1966: She [...] would prove a salt-cunted, — a hot-arsed one.