Green’s Dictionary of Slang

sloshed adj.

also shlossed, slozzo, soshed
[slosh n.1 (1) + slosh v.2 (1)]

drunk.

[US]Minneapolis Jrnl (MN) 29 Mar. 11/4: he comes wadin’ up the aisle a-swining his arm and singinn’ like a soshed [sic] Scotchman.
[UK]S.E. White Rules of the Game 102: ‘Drunk, eh?’ ‘Spifflicated, pie-eyed, loaded, sloshed.’.
[Aus]Bulletin (Sydney) 12 Nov. 44/2: Well, don’t you think it’s the height of folly to allow yourself to get ‘sloshed’ with all that money on you?
[UK]R. Llewellyn None But the Lonely Heart 341: I’m a belted earl, I am. Well, not so much belted as sloshed.
[US](con. 1943) A. Myrer Big War 151: You’re kind of slozzo.
[Can]M. Richler Apprenticeship of Duddy Kravitz (1964) 200: Was he sloshed?
[UK]F. Norman Guntz 133: I had it away back to my gaff more than a little sloshed.
[Aus]J. Wynnum I’m a Jack, All Right 8: Get sloshed tonight, for tomorrow you may go to sea.
[US]C. McFadden Serial 105: I know you’re really in the pits, but getting sloshed isn’t gonna help.
[Aus]B. Robinson Aussie Bull 23: [H]e’d escaped to the pub and got sloshed.
[US]‘Joe Bob Briggs’ Joe Bob Goes to the Drive-In 131: I was sloshed on Bud, my regular brand.
[UK]K. Sampson Awaydays 171: Sloshed out of our senses with hair o’ th’ dog Bloody Marys.
[UK]Indep. Rev. 29 Mar. 4: The MI6 agent [...] became sloshed in a bar.
[Ire]G. Coughlan Everyday Eng. and Sl. 🌐 Shlossed (a): very drunk.
[Aus]S. Maloney Something Fishy (2006) 70: The randy desperation which led me to crack on to a half-sloshed twenty-four-year-old.
[US]Eble Campus Sl. Nov.
[US]D.R. Pollock Devil All the Time 147: He had been down all week [...] and he felt the need to get good and sloshed.
[Aus](con. 1943) G.S. Manson Irish Fandango [ebook] The thickset man stood up quickly but unsteady; obviously well sloshed.
M. Forsyth Short History of Drunkenness 40: Egyptians were proud of their binge-drinking. There was no shame in getting sloshed.

In compounds

slosh sex (n.)

sexual intercourse at a time when one is very drunk.

[UK]Guardian 31 Jul. 18: She has what is called slosh sex.