Green’s Dictionary of Slang

fancy n.1

1. the vagina.

Thornley Longus 124: [She] directed him to her Fancie, the place so long desired and sought.
[UK]Wandring Whore I 13: Catching hold of his trap-stick, she, (when she saw him stiff and strong, and itching to be at her,) taught the unskilful rustick to loose his maidenhead by guiding him to her fancy.
[UK]N. Ward Rambling Fuddle-Caps 3: And as for the Rudders that steer our Affections, As Fancy, that Pilot, shall give ’em directions.
[UK]‘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 .

2. a girlfriend; a mistress; a desirable girl.

[UK]Egan Life in London (1869) 190: The extravagant Fancy [...] trying to take the shine out of all the other females in the circle, merely to show the taste and liberality of her keeper.
[UK]London Life 7 June 6/2: So while their peers are fondling with their ‘fancies,’ they are flirting with their ‘flames’.
[UK]Farmer Vocabula Amatoria (1966) 53: Caprice, m. A lover or mistress; ‘a fancy’.
[Aus]Bulletin (Sydney) 30 July 14/2: ’Ow’s th’ fancy?’ Ponto spat viciously. ‘T’ ’ell with th’ fancy! She’s been ’n’ slung me.’.

3. (US) a prostitute.

[US](con. 1870s) Miller & Snell Why the West was Wild 14: The names by which the frontiersmen referred to the ladies in question [...] soiled doves, fancies, calico queens.

4. see fancy man n.1

In compounds

fancy house (n.) [house n.1 (1)]

1. (UK und.) a public house that offers facilities for gambling.

[UK]Man of Pleasure’s Illus. Pocket-book n.p.: This house is notorious as the first ‘fancy house’ in London for dogs, sparring, and rat-killing. [...] the landlord, too, is a right’un.

2. (US) a whore-house, a house of ill-repute, a brothel.

[US]Life in Boston & N.Y. (Boston, MA) 8 Oct. n.p.: He became too lazy to work and ‘turned out’ as a pimp for a low ‘fancy house’.
[UK] ‘Couldn’t Stand the Press’ in Rakish Rhymer (1917) 95: I went in a fancy house, / But still I had ill luck.
[US]J. O’Connor Wanderings of a Vagabond 218: Perhaps [...] he prefers visiting one of the fashionable bagnios. Your roper and sharper is at home there; he knows all about the principal fancy houses, and is personally acquainted with all the inmates.
[US]J.W. Carr ‘Word-List from Hampstead, N.H.’ in DN III iii 187: fancy house, n. A house of bad repute.
[US]‘R. Scully’ Scarlet Pansy 136: I don’t have to be bought like a flossy dame in a fancy house.
[US]Maledicta IX 148: The compilers ought to have looked farther afield and found: […] fancy house, fleshpot, gaff.
[US](con. 1940s) C. Bram Hold Tight (1990) 67: ‘Getting arrested didn’t cure you of whorehouses, boy?’ ‘Me and fancy houses suit each other fine.’.