Green’s Dictionary of Slang

gargle v.

also gurgle
[gargle n. (1)]

to have a drink.

[UK]Sporting Times 3 Aug. 5/5: We gargled [F&H].
[UK]C. Rook Hooligan Nights 37: Young Alf, being about to gargle, set down his glass.
[Aus]Sun. Times (Perth) 1 Jan. 4/7: He’ll drop his pals who gargle much / And take to psalms and psalters.
[UK]Marvel III:55 3: Deuce take me, man, why don’t you gargle?
[US]A. Baer Two and Three 4 Feb. [synd. col.] Down in Georgia they gargle near-beer.
[Aus](con. WWI) L. Mann Flesh in Armour 90: ‘Could you gurgle a bit, sir?’ [...] and [he] got a good swig of rum and water from his water bottle down the boy’s spluttering throat .
M. Fulcher ‘Believe Me’ in Afro-American (Baltimore, MD) 23 May 12/4: Thirsty travellers could drop in and gargle a beaker or two.
D. Burley N.Y. Amsterdam Star-News 3 Apr. 13: If you want to gargle, be like the bear’s brother, try and get further by laying some scratch on me.
[Aus]J. Wynnum I’m a Jack, All Right 36: You’ve got a bloody big hangover from gargling.
[Aus]R. Aven-Bray Ridgey-Didge Oz Jack Lang 11: Lighting up an African he gargled on slowly.
[US]R. Price Clockers 496: That bastard used to gargle down a fifth of scotch a night.
[Ire]L. McInerney Glorious Heresies 113: ‘And then you all hug or some shit and Tony goes home to resume gargling himself into the ground’.
[US]J. Ellroy Widespread Panic 79: I gargled Old Crow.