Green’s Dictionary of Slang

downtown n.

1. (US black) the female genital area, in the context of cunnilingus.

[US]C. Panzram Journal of Murder in Gaddis & Long (2002) 116: A face artist is one who goes downtown for lunch and nose-dives into the bushes when he’s hungry.
[US]Ebonics Primer at 🌐 downtown Definition: oral stimulation/ excitement of the female vagina. usually expressed as, ‘daddy, take me on downtown.’ Example: Girl, I take you on ‘downtown’ but first we goin’ up ‘Penis Street’.

2. (US police/Und.) police headquarters.

[US]P.J. Wolfson Bodies are Dust (2019) [ebook] The opening of the theatres and night-clubs and the return of the crooks, gamblers and whores kept me downtown.
[US]R. Chandler High Window 186: I’m quite willing to go downtown and say I shot him. But don’t lay your smooth white paw on me again – if you want my story.
[US]J. Archibald ‘Klump a la Carte’ Popular Det. July 🌐 A private flatfoot hides most things he finds out from real cops [...] I bet they don’t know from nothin’ about us downtown.
[US]H. Simmons Corner Boy 181: ‘Get out of the car, you’re taking a little trip downtown.’ [...] ‘You take me down and we’ll see who does what to who. This guy I’m thinking of don’t like none of his boys drug downtown.’.
[US]C. Himes Blind Man with a Pistol (1971) 112: Did the boys downtown make him?
[US]N. Thornburg Cutter and Bone (2001) 34: Get dressed [...] We’re going downtown.
[US]C. Stroud Close Pursuit (1988) 239: Downtown knows this is a bullshit charge.
[US]C. Hiaasen Stormy Weather 177: Killebrew [...] had some heavy juice downtown.
[US]J. Stahl Plainclothes Naked (2002) 292: You wanna tell me what you’re doing here or you wanna go downtown?
[US]S.A. Crosby Razorblade Tears 102: ‘That’s how I end up having to arrest you and drag you downtown’.

3. (US black) the area where the black community lives; thus down-towner.

[US]‘Digg Mee’ ‘Observation Post’ in N.Y. Age 26 July 9/8: Glimpsed Irene Parsons with a ‘down-towner’ [...] Thursday nite.
[US]R. Goffin Horn of Plenty 92: Below the Tenderloin or red-light district, lay the Creole zone, called ‘downtown’.
[US]‘Ed Lacy’ Room to Swing 108: I stopped ‘downtown’ for a paper and a change of underwear.

4. (US) a generic for the city government, the police department and similar authorities.

[US]G. Cain Blueschild Baby 66: [C]an’t stand a bust, can’t stand to go downtown. My parole, my record, my past, will convict me.
[US]R.D. Pharr S.R.O. (1998) 520: ‘Your application [...] will never be processed unless you get a rabbi to light a fire under someone downtown’.
[US]S. Morgan Homeboy 98: It takes a lot of pictures to pay off attorneys and grease the boys downtown.
[US]C. Cook Robbers (2001) 11: He’s catching heat downtown.

In phrases

go downtown (v.) (also head downtown) [play on down n.5 ]

(US drugs) to use some variety of depressant, e.g. barbiturate, heroin.

[US]E. Little Another Day in Paradise 182: [I’m] heading downtown these days. Mel turned me out on smack. Go fast don’t cut it any more. [Ibid.] 187: For a guy that likes to go downtown you look like ya ready to break the sound barrier just standing there.
[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 61/2: downtown n. a barbiturate, e.g. heroin; the effect derived from taking a barbiturate: ‘I want to go downtown today.