Green’s Dictionary of Slang

steaming adj.²

drunk.

1875		Cambria Freeman (Edensburg, PA) 22 Oct. 1/7: The word Drunk is incomparably richer in synonyms than any other word [...] to this we may add: steaming it, goggle-eyed, have a brick in his hat, balmy, o be joyful.
1973		(con. mid-1960s) J. Patrick Glasgow Gang Observed 63: Mick Malloy, who had been so drunk the night before that he had looked as though he was still ‘steamin’’.
1986		J. Sullivan ‘The Miracle of Peckham’ Only Fools and Horses [TV script] Oi, Rodney, you were a bit steaming when you come in last night, weren’t you, eh?
1999		Indep. 21 July 3: Was he merely a little sozzled or possibly sloshed or was he absolutely steaming.
2001		I. Welsh Glue 45: Nivir drinks, n grumbles at me if ah come in steamin oot ay ma heid.
2009		Berkshire Eagle (Pittsfield, MA) 1 Nov. 29/1: You can’t hold a good Scotsman back when he wants to get [...] buckled, fou, guttered, [...] mortal, pie-eyed [...] plastered [...] steaming, stocious or wrecked.
2017		Guardian CiF 2 Jan. 🌐 You were supposed to be able to hold your drink. Getting absolutely steaming & falling all over the place was an embarrassment.
2019		A. Killilea Boyo-wulf at https://boyowulf.home.blog 22 Apr. 🌐 That bould fella, grim and greedy, he was ready, steaming and fierce.
2020		G. Armstrong Young Team 39: An elder boy comes oot the pub fuckin steamin.