Green’s Dictionary of Slang

sluice n.

[SE sluice: (1) a channel; a gap, a hole, a gash; (2) a valve for regulating the flow of water; (3) to pour something through a sluice]

1. the vagina.

[UK]T. Brown Letters from the Dead to the Living in Works (1760) II 184: That whore, my wife [...] that us’d to open her sluice and let in an inundation of shabroons to gratify her concupiscense.
[UK]B. Mandeville An Essay upon Whoring iii: From Your stopping up those Drains and Sluices we had to let out Lewdness [...] Those Ramparts and Ditches within which the Virtue of our Wives and daughters lay so conveniently intrench’d.
[UK]Harlot’s Progress 30: The Box serv’d too for other Uses, / To hold Machines for broken Sluices.
[UK]‘Toasts’ in New Cockalorum Songster in Spedding & Watt (eds) Bawdy Songbooks (2011) II 30: Miller’s music: opening the sluice and grinding the stones.

2. the penis.

[UK]Rochester ‘A Ramble in St James’s Park’ in Works (1999) 78: Had she pick’d out to rub her Arse on, / Some stiff-Prick’d Clown, or well-hung Parson, / Each Jobb of whose Spermatick Sluice / Had fill’d her Cunt with wholesome Juice.
[Scot]Robertson of Struan ‘On Mris. F-----n’ in Poems (1752) 82: Unless his full spermatick Sluice / Was ready to run o’er, / Who’d spill a Drop of wholsom Juice / On such a stinking Whore?

3. (UK Und.) a drink.

[UK]Leaves from Diary of Celebrated Burglar 17/2: After several ‘sluices,’ he again led out his inammorata to the field of action.
[Aus]Crowe Aus. Sl. Dict. 76: Sluice, a drink.

4. the mouth.

[UK]Farmer & Henley Sl. and Its Analogues.
[UK]‘Ramrod’ Family Connections 40: Pouring out my feelings — and my spunk — into the girl’s hot sluice.

5. sexual intercourse.

[UK]Bill Naughton Alfie Darling I asked her would she like a sluice? She wasn’t quite sure what I meant.

In compounds

sluice-cunted (adj.) [SE sluice, a channel, a run off + cunt n. (1)]

having a large vagina.

[Scot] ‘Plenipotentiary’ in Burns Merry Muses of Caledonia (1965) 203: Each sluice-cunted bawd, who’d been shagged [?] abroad, / Till her premises gaped like a grave, sir.
[US]Maledicta IV:2 (Winter) 184: The depucellated virgin […] becomes worthy of the denominations cow-cunted, bushel-cunted, sluice-cunted, double-cunted.
sluice-head (n.)

a drunk.

[UK]R. Beach Pardners (1912) 10: I reckon all our booze combined would have made a fair sluice-head.
sluice-house (n.) (also sluicing house)

1. a public house, a tavern; used as a proper name; also attrib.

[UK]T. Hood ‘Epping Hunt’ Works (1862) II 307: The seventh, in a Sluice-house box / He took his pipe and pot.
[UK]‘Going Out a Nesting’ in New Cockalorum Songster in Spedding & Watt (eds) Bawdy Songbooks (2011) II 28: [We] at the sluice-house made a stay, / There took in gatter for the day.
[UK]Era (London) 24 Dec. 14/3: He was ‘half seas over’ when he left the Sluice House.
(con. 1830s) W. Wroth Cremorne and the Later London Gardens 42: The Eel-Pie (or Sluice) House, Highbury. This tavern on the New River, between Highbury and Hornsey Wood House, was well known to Cockney visitors.
[UK]D. Stewart Shadows of the Night in Illus. Police News 20 July 12/4: ‘Meet me tomorrow by the Goat and Compasses’ [...] ‘All right, me hearty, I’ll find the sluicing house’.

2. the mouth.

[UK]Egan Bk of Sports 203: Sam’s sluice house was again severely damaged.