Green’s Dictionary of Slang

cloud n.

1. as a product of smoke.

(a) tobacco, tobacco smoke.

[UK]B.E. Dict. Canting Crew.
[UK]A. Smith Lives of Most Notorious Highway-men, etc. (1926) 204: Cloud, tobacco.
[UK]New Canting Dict.
[UK]Bailey Universal Etym. Eng. Dict.
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[UK]Cruikshank & Wight Sun. in London 76: Jolly good breakfast [...] Blow a cloud. Three or four grogs. [...] Jolly good supper. A couple of grogs. Another cloud.
[UK]B. Patterson Life in the Ranks 123: A confirmed lover of the soothing weed [...] always appears to exhibit the most blissful and self-satisfied picture when puffing a cloud.

(b) the smoke that one inhales from a pipe of crack cocaine.

[US](con. 1985–90) P. Bourjois In Search of Respect 79: Your only worry was making a cloud in your stem [glass crack pipe].

(c) (drugs) the stimulating effect that follows smoking crack cocaine.

[US]E. Richards Cocaine True 143: You know, it’s the cloud that will get you.

(d) crack cocaine.

[US]E. Richards Cocaine True 143: Originally, it was the cloud that was fun.
[US]ONDCP Street Terms 6: Cloud — Crack Cocaine.

2. (UK Und.) an attic.

[UK]Clarkson & Richardson Police! 345: Gunners and grasshoppers sneak about watching their opportunities to get up the ‘dancers’, and to ‘dig themselves away,’ [...] in the ‘cloud’ (attic), until all is quiet.

3. a derog. term for a black person, esp. a crowd of black people [play on smoke n. (3a) but note cloudy adj.1 ].

[US]R. Fisher Walls Of Jericho 297: Synonyms of Negro [...] : Cloud, crow, darky, dinge.
[US](con. 1920s) J.T. Farrell Young Manhood in Studs Lonigan (1936) 371: The whole neighbourhood is being ruined [...] it’s going to be so full of black clouds that a white man won’t belong in it.

In phrases

blow a cloud (v.)

1. to smoke a pipe of tobacco or a cigar.

[UK]‘One of the Fancy’ Tom Crib’s Memorial to Congress 39: But this I’ll say, a civiller Swell I’d never wish to blow a cloud with!
[UK]Bell’s Life in London 23 Dec. 2/5: A jolly tuck-out was propos’d by a parcel of worthies, then blowing their clouds at the Castle.
[UK] ‘Life In London’ in Swell!!! or, Slap-Up Chaunter 11: Chaunt a stave, and blow a cloud.
[Aus]‘A Week in Oxford! in Bell’s Life in Sydney 15 Nov. 4/1: We sipped our wine and blew a cloud.
[UK]‘Frank Forester’ My Shooting Box 129: I promised to go down and have a jaw, and blow a cloud with old Tom.
[UK]Sam Sly 24 Mar. 4/1: Seated to the left of the fire, blowing his cloud, was Bob Br—k, silver-polisher, a knowing old fox.
[UK]‘Epistle from Joe Muggins’s Dog’ in Era (London) 15 Aug. 4/2: -I'm a dorg as smokes like a man [...] blowin my kloud in a kontemplatin manner this week, and rumminatin upon hoornan affairs.
[Ind]Delhi Sketch Bk 1 Jan. 17/1: There’s a snug little pot-house / [...] / Where many a cloud in my youth I have blowed.
[UK]M.E. Braddon Trail of the Serpent 26: I’m going to light my pipe, why if you like to blow a cloud too, you can.
[Aus]Melbourne Punch 21 July 25/2: In English slang, he ‘blew a cloud’ / Or plainly speaking, smok’d his pipe.
[US]‘Mark Twain’ Innocents Abroad 62: Blowing suffocating ‘clouds’ and boisterously performing in the smoking-room at night.
[UK]‘Old Calabar’ Won in a Canter I 207: ‘[T]ell you what, Noodle, my boy,’ said he one morning, as tbey sat blowing a cloud.
[SA]B. Mitford Fire Trumpet I 234: Come and blow a cloud before you turn in.
[Aus]Crowe Aus. Sl. Dict. 10: ‘blow a cloud’; take a smoke.
[UK]N. Gale ‘Down and Up’ in Close of Play 16: If I was you an’ you was me, / I’d grin, an’ rummidge in my fob / Or trousis pocket for a bob, / An’ frank a down-an’-outer through / The turnstile, Guvnor, same as you, / To blow a cloud an’ take a squint / At Robins on the sprint.

2. (also cock a cloud) to smoke opium; thus cloud-blower, an opium smoker.

[US]A.J. Pollock Und. Speaks 22/2: Cloud blowers, opium smokers; dopefiends; hopheads. [Ibid.] 23/1: Cock a cloud, to smoke opium.
Guanghua Wu Chinese/Eng. Dict 2589: blow a cloud – to smoke opium.
on the cloud

intoxicated by marijuana.

[US]H. Ellison ‘I’ll Bet You a Death’ in Deadly Streets (1983) 43: [...] wishing he had a high-stick to put him on the cloud. A little pot and then I’d take on the whole damned force.

SE in slang uses

In compounds

cloud-chaser (n.)

(US) a pilot.

[US]G. Fowler Schnozzola 38: There was an airplane flyer living at the apartment house where Jeanne lived [...] I’d go to the window to see when she’s comin’ back with that cloud-chaser.
cloud-walker (n.)

(US teen) a good dancer.

[US]Yank (Far East edn) 24 Mar. 18/2–3: Some of today’s teen-agers – pleasantly not many – talk the strange new language of ‘sling swing.’ In the bright lexicon of the good citizens of tomorrow [...] A fancy dancer is a ‘jive bomber’ or a ‘cloud walker’.