Green’s Dictionary of Slang

1. (also whim) the vagina [+ link to quim n.].

1602		Dekker Satiromastix III i: Ile holde my life thou art struck with Cupids Birde-bolt, my little Prickshaft, art? Dost thou loue that mother Mumble-crust, dost thou? dost thou long for that whim-wham?
1627		J. Taylor ‘An Armado’ in Works (1869) I 81: The Whimwham, a drumler [i.e. a small pirate ship].
a.1701		N. Ward Revels of the Gods (1704) 14: That Cancer at Midnight came Crawling upon me, / And pinch’d with his Claws where’t like to ’ve undone me. / Pox take you, says Jove, for a Scolding old Drab, / Can you not, at these Years, keep your Whim from a Crab?
1725		View of London & Westminster (2nd part) 52: [in a list of prostitutes] Miss Whimwham [Is Visited] By a dignified Gentleman of the Law.
c.1775		Only True and Exact Calendar title page: A great many Common Hacks are in Town, to Run for small Plates, among whom are, Miss Jenny Whim, Molly May, Dianna Frost, Miss Handy, Dolly Thunderbum.
1833		‘’Mid Young Whores & Gallows She’s’ in Out-and-Outer in Spedding & Watt (eds) Bawdy Songbooks (2011) IV 141: Give me my lowly thatched wim-wam again.
1837		‘I’d Be a Member Mug’ in Flash Olio in Spedding & Watt (eds) Bawdy Songbooks (2011) III 203: I’d be a member-mug, up in a chamber, / Where wim wams, and fancy’s, and jokesses meet .
1890–1904		Farmer & Henley Sl. and Its Analogues.

2. the penis; occas. testicles (see cit. 1681).

1604		Marston Malcontent I iii: Sir Tristram Trimtram come aloft, Jack-a-napes with a whim wham?
1641		J. Taylor Reply as True as Steele 6: Some formes of flowers ... twixt the Beast legges ... To hide his whim wham.
1659		Florio New World of Words (rev.) n.p.: Tencone, a Winchester goose, a Cunt-botch, also a mans whim-wham.
1681		‘Unfortunate Jack’ in R. Thompson Pepys’ Penny Merriments (1976) 227: [His] breeches ’twixt his legs were torn his whim-whams they hung out.
1841		‘Billy Taylor’s Three Square’ Gentleman’s Spicey Songster 11: Billy Taylor was a gay young fellow, / Full of spunk, and full of glee; / With his whim-wham, bag of tricks, / Hanging down below his knee.

3. (also whim-wam) nonsense, rubbish.

1807		Irving & Paulding Salmagundi (1860) 340: With the Hall he has inherited almost all the whim-whams of its former possessor.
1860		Hotten Dict. of Modern Sl. etc. 245: Whim-wam an alliterative term, synonymous with fiddle-faddle, riff-raff, &c., denoting, nonsense, rubbish, &c.
1864, 1867, 1870		Hotten Sl. Dict.

4. (US) in pl., anxiety, nervousness.

1953		J. Thompson Savage Night (1991) 19: I had a crazy idea about him, one that kind of gave me the whimwhams.
1962		Casey ‘Kid’ Motsisi ‘Kid Malalapipe’ Casey and Co. (1978) 45: I begin to get the whim-whams when the fact hits me square in the face that Kid Malalapipe is not working.
2001		S. King Dreamcatcher 612: The rational part of Deke’s mind had been harboring the hope [...] that he was imagining the whole thing, just suffering the whimwhams from all the weird news.

5. (US) in pl., the female breasts.

1970

‘Troy Conway’ Cunning Linguist (1973) 19: The rising, high mounds of her whim-whams were twin Alps, gloriously crested with rosy nipples. [Ibid.] 40: The gorgeous whim-whams might have still been imprisoned by a black bra. They didn’t droop or sag.