Green’s Dictionary of Slang

brandy n.

1. (UK Asian) heroin [initial letter of brown n. (4c)].

[UK]G. Knight Hood Rat 171: All he needs is £10 to buy a 0.3 gram rap of brown or brandy [or] ‘one of each’, a mixed bag of whisky and brandy, crack and smack.
[UK]G. Krauze What They Was 34: [D]ark n light which means heroin and crack, or as everyone round here calls it buj and work or brown and white or brandy and champs or Bobby and Whitney.

2. (Polari) the buttocks or anus.

[UK]P. Baker Fabulosa 290/1: brandy bum [...] 296/2: put on the brandy to lubricate the anus, in preparation for anal sex.

SE in slang uses

In compounds

brandy and fashoda (n.) [play on SE based on the Fashoda Incident of 1898, when French and British forces clashed in the Sudan following the battle of Omdurman]

(UK society) brandy and soda.

[UK]London Eve. Standard 19 Oct. 5/3: M. Grosclaude [...] hopes the present misunderstanding will disappear when ‘the fumes of brandy and fashoda shall have dispelled’.
[UK]J. Ware Passing Eng. of the Victorian Era.
brandy-face (n.) (also brandy-nose) [the effects of consistent over-drinking]

a drunkard; thus brandy-faced adj., red-faced.

C. Cotton Aeneid II (1692) 85: You goodman brandy-face, unfist her .
[UK]N. Ward A Frolic to Horn-Fair 11: And as for you, you Brandy Fac’d, Bottle-Nos’d, Bawdy, Brimstone Whore.
[Ire]K. O’Hara Tom Thumb I iv: Stop, brandy-nose!
[UK]Proceedings at Sessions (City of London) Apr. 16/2: He taking an occasion to call her Brandy-Face, she reply’d that hers was no more a Brandy-Face, than his was a Jews-Face.
[UK]Newcastle Courant 31 July 3/2: A New Pantomime Entertainment [...] Squire Gawkey, Mr Robertson; [...] Bess Brandy-Face, Mr Pearce.
[UK]‘Peter Pindar’ ‘Lyric Odes’ Works (1794) I 56: [footnote] The fair artist hath [...] communicated to canvass the old bard’s idea of the brandy-faced Hours.
[UK]Grose Classical Dict. of the Vulgar Tongue n.p.: brandy-faced. Red-faced, as if from drinking brandy.
[UK]C. Dibdin Yngr Song Smith 117: My wife’s christian name it was Brandy-fac’d Nan.
[UK]Lex. Balatronicum [as cit. 1785].
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue [as cit. 1785].
[UK]Examiner (London) 1 Jan. 7/1: They were pounced upon by an overfed man with a brandy face.
[UK]Paul Pry 11 Dec. n.p.: We advise a brandy-faced conductor of a Blackwall omnibus to attend to the washing tub, and not to boast so much.
G.A. Sala Twice Around Clock 284: Hulking labourers and brandy-faced viragos, squabbling at tavern doors.
[Scot]R.L. Stevenson Treasure Island 137: I could hear, as well as see, that brandy-faced rascal.
[UK]Sheffield Eve. Teleg. 4 Apr. 3/4: Now, old brandy face, where are you going?
brandy-latch (n.)

(Polari) a lavatory cubicle, as used for sex.

[UK]P. Baker Fabulosa 290/1: brandy latch a toilet cubicle.
brandy-pawnee (n.) (also brandy-pauni, brandy-pauny, brandy-pawny) [Hind. pani, water]

(Anglo-Ind.) brandy and water.

[Ind]‘Quiz’ Grand Master Preface: And died at last with brandy pauny [F&H].
[UK]Reading Mercury 23 Oct. 2/3: Having furnished ourselves wioth a case of cigars and a bottle of ‘brandy pawnee’, we left.
[UK]Thackeray Newcomes I 8: ‘I’m sorry to see you gentlemen drinking brandy-pawnee,’ says he. ‘It plays the deuce with our young men in India.’.
[Ind]Delhi Sketch Bk 1 Apr. 40/1: I know he traced the Abscess / That gave me such distress. / To the beer and brandy pawnee — / That I used to drink at mess.
[Ind]G.F. Atkinson Curry & Rice (3 edn) n.p.: Then jungles, fakeers, dancing-girls, prickly heat, / Shawls, idols, durbars, brandy-pawny.
[UK]W.H. Smyth Sailor’s Word-Bk (1991) 129: Brandy-Pawnee. A cant term for brandy and water in India.
[Ind]‘Aliph Cheem’ Lays of Ind (1905) 142: Then there was brandy-pawnee round / And the Parson ate some cake.
[UK]Star (London) 22 Aug. 4/6: What can be more condicive to heat apoplexy than ‘brandy pauny’ and highly curried [...] meats.
[Aus]Sydney Sl. Dict. (2 edn) 2: Brandy Pawnee - Brandy and water.
[Ind]L. Emanuel Jottings [...] of a Bengal ‘qui hye’ 13: A ‘peg’ of ‘Bràndee pànee’ (brandy and water) or if, as he probably is, very ‘seedy,’ he will call out ‘bràndee srob, oure belàtee paunee,’ (brandy and soda), in fact the ‘B and S’ .
[Ind]Yule & Burnell Hobson-Jobson (1996) 113: brandypawnee, s. Brandy and water; a specimen of genuine Urd?, i.e. Camp jargon, which hardly needs interpretation.
[UK]G.A. Sala Things I Have Seen II 182: I had been reading about the extensive consumption of ‘brandy pawnee’ in India.
[UK]Shields Dly Gaz. 16 Mar. 3/3: It would seem that tiffins and brandy pauni are not, after all, very deadly.

In phrases

brandy is Latin for (a) goose [pun on Lat. anser, a goose/SE answer]

used to apologize for drinking brandy after eating goose.

[UK]Swift Polite Conversation 70: lord sm.: Tom, can you tell me what’s Latin for a Goose? nev.: O my Lord, I know that; Why, Brandy is Latin for a Goose.
[UK]Grose Classical Dict. of the Vulgar Tongue ms. additions n.p.: Brandy is Latin for Pig & Goose, an Apology for driniking a Dram after either.
[UK]Grose Classical Dict. of the Vulgar Tongue (2nd, 3rd edn) n.p.: Brandy is Latin for a goose; a memento to prevent the animal from rising in the stomach by a glass of the good creature.
[UK]Lex. Balatronicum [as cit. 1788].
[UK]‘Jon Bee’ A Dict. of the Turf, The Ring, The Chase, etc. 111: ‘Latin for goose’ — a dram.
Bright Gaz. 13 Nov. 4/5: As brandy is Latin for goose, wine is Greek for fish.
[UK]Bell’s Life in London 28 Mar. 2/2: Brandy is Latinfor defunct goose.
Davies Supplement Gloss. n.p.: brandy is latin for a goose, probably because people took a dram after goose, Ans(w)er […] being the Latin word for goose.
[UK]Brewer Dict. of Phrase and Fable I 171/2: brandy is latin for goose (or fish), this punning vulgarism appears first in Swift’s Polite Conversation: the pun is on the word answer. Anser is the Latin for goose, which brandy follows as surely and quickly as an answer follows a question.