Green’s Dictionary of Slang

alky adj.

alcoholic.

1930		implied in alky stiff
1952		Kerouac letter 8 Feb. in Charters I (1995) 338: I get high drunk [...] play Ruth Brown wildjump records among drunken alky whores.
1979		S. King Dead Zone (1980) 364: Couple of old alky diesel-dykes, that’s what they are.
1981		L. Bangs in Psychotic Reactions (1988) 345: A middle-aged slut with bulging reddened alkie eyes.
1999		N. Cohn Yes We Have No 356: It’s dossers like us, pathetic alky misfits, who are ruining the West End.
2001		N. Griffiths Sheepshagger 158: No dad, discarded by his alkie mam.
2011		J.J. Connolly Viva La Madness 46: Morty spent his early life being the hungry kid, plotted up outside the boozer [...] wating on the alkie mother.
2020		(con. 1991-94) W. Boyle City of Margins 37: [T]wo skeezy alkie ladies drinking at the far end of the bar.

In compounds

alky stiff (n.) (also alkee stiff, alki stiff) [stiff n.¹ (5a)]

(US) an alcoholic tramp.

1897		J. London ‘The Road’ in Hendricks & Shepherd Jack London Reports (1970) 311–21: A curious class, closely connected with the Chinatown bum who drinks cheap gin and fills an early grave, is that of the ‘Alki Stiffs.’.
1913		J. London John Barleycorn (1989) 76: An alki-stiff is a tramp who drinks druggist’s alcohol.
1918		‘A-No. 1’ Mother of the Hoboes 44: The Rating Of The Tramps 27. Alkee Stiff & 28. White Line Stiff. Confirmed consumers of alcohol.
1923		N. Anderson Hobo 101: [as cit. 1918].
1930		G. Milburn ‘The Dealer Gets It All’ in Hobo’s Hornbook 150: With Alton Red, the alky stiff, sloppin’ up on Hopper’s Rye.
1931		Irwin Amer. Tramp and Und. Sl. 18: Alki stiff. — One who habitually drinks alcohol or inferior liquor.