Green’s Dictionary of Slang

down adj.1

[attrib. uses of down adv.2 ]

1. first-rate, excellent.

[US]T. Haliburton Letter-bag of the Great Western (1873) 143: Keep dark. If you have a rael right down clipper of a horse in your stable, a doing of nothing, couldn’t you jist whip over to Portland on the 20th, to meet me, in your waggon?
[US]W. Brown Monkey On My Back (1954) 43: Dave was a down cat (a nice guy).
[US](con. 1953–7) L. Yablonsky Violent Gang (1967) 62: Having an agency concerned [...] seemed to give it rep in gang circles. As a gang leader once told me: ‘Having a worker makes you a real ‘down’ club.’.
[US]H.E. Roberts Third Ear n.p.: down adj. agreeable; best ever; favorable; nice.
[US]A. Heckerling Clueless [film script] You are a down girl. I’ll call you tomorow.
[US]W.D. Myers ‘some men are just funny that way’ in What They Found 79: ‘[T]his was a coaches’ tournament and there were a bunch of down dudes in the action’.

2. aware, sophisticated, knowledgeable.

[US]H. Simmons Corner Boy 36: You’re a pretty down ole babe.
[US]W. Brown Teen-Age Mafia 8: A guy who could take care of himself and hold the line, a real down cat.
[US]B. Gonzales I Paid My Dues 142: For the ‘down’ people he had a pound of smoke.
[US]E. Torres Carlito’s Way 20: He was a down cat and he was connected.
[US](con. c.1967) J. Ferrandino Firefight 147: Morris is a down dude [...] Peterson is an asshole.
[US]R. Shell Iced 101: The coolest, the sexiest, the even-more-down-than-NYC-Blacks from Philadelphia.
[US]T. Swerdlow Straight Dope [ebook] He said ‘full court’ to remind me I was just a white boy no matter how down I thought I was.

3. (US black) alert, tough, good in a fight.

Beckley Post-Herald (WV) 1 Dec. 7/4: Down — Bad, tough [...] Down kiddie — A tough guy. He doesn’t punk out, he’s not chicken.
[US]N. Heard Howard Street 74: The only thing you ever had on a young, down stud was a longer length of time to make damn fools outta yourselves.
[US]Hall & Adelman Gentleman of Leisure 181: Basically he’s a down pimp and [...] he’s gotten himself back together as a pimp.

4. (US black) loyal, trustworthy.

[US]E. Torres Carlito’s Way 59: [I]f some dude come out of the slams or couldn’t make a bail, I was always down.
[US]H. Gould Fort Apache, The Bronx 121: Toni was a real down Latina, all right, standing out there in the cold taking care of her man.
[US]King Tee & Mixmaster Spade ‘Ya Better Bring a Gun’ 🎵 But they took control, slingers walk real tall / While real down gangbangers write their set on the wall.
[US]Da Bomb Summer Supplement 5: Down [...] ! 5. To be true to one’s race, nationality, or ethnic group.
[US]P. Beatty Tuff 181: So many niggers I know to be down decent motherfuckers.

SE in slang uses

In compounds

downblow (n.)

(Irish) a disaster.

[Ire]Dublin Mag. July/Sept. 14: Nothing left to them now but the four old cows and the bare little farm. A downblow wouldn’t so much matter if they were big people .
downface (v.)

to assert something in order to make someone look foolish.

[Ire]P.W. Joyce Eng. As We Speak It In Ireland (1979) 250: He downfaced me that he returned the money I lent him, though he never did.
[Ire]Joyce Ulysses 316: As true as I’m drinking this porter if he was at his last gasp he’d try to downface you that dying was living.
[Ire]‘Myles na gCopaleen’ Faustus Kelly in ‘Flann O’Brien’ Stories & Plays (1973) 170: I think you’d know how to down-face the bastards and clean up all this dirty jobbery and back-door stuff.
[Ire](con. 1940s) B. Behan Borstal Boy 30: It wouldn’t do [...] to downface the gentleman.
down-hills (n.)

doctored dice that will always show low numbers.

[UK]J. Wilson Cheats IV i: [I] taught you the use of up-hills, down-hills, and petars* (*Note. Terms applicable to false or loaded dice, or to the knavish mode of handling them).
[UK]B.E. Dict. Canting Crew n.p.: Down hills c. Dice that run low.
[UK]New Canting Dict. [as cit. c.1698].
[UK]Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK] ‘Modern Dict.’ in Sporting Mag. May XVIII 100/1: .
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.