Green’s Dictionary of Slang

crinkum-crankum n.

the vagina.

1670		Blount Nomo-Lex. n.p.: Here I am, Riding upon a Black Ram, Like a Whore as I am. And, for my Crincum Crancum Have lost my Binkum Bankum. And for my Tails Game, Have done this Worldly shame. Therefore I pray you Mr Steward let me have my Land again.
c.1786		Grose Classical Dict. of the Vulgar Tongue ms. additions .
1788, 1796		Grose Classical Dict. of the Vulgar Tongue (2nd, 3rd edn).
1811		Lex. Balatronicum.
1823		‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc. 59: Crinkum crankum — a woman’s misdoings, who is untrue to her deceased husband.
1890–1904		Farmer & Henley Sl. and Its Analogues.
c.1904		A. Crowley Snowdrops from a Curate’s Garden 36: The P....e of W...s [...] was lifting for the final effort his fantastically-tattooed bean-tosser upon the stupendous crinkum-crankum of the Imperial fuckstress.