1. (Aus.) one who is addicted to cheap wine, an alcoholic.
|Canebrra Times 29 Oct. 2/4: His 18-year-old mate, Russell Drinkworth, has the nickname ‘Plonko’.|
|Mercury (Hobart, Tas.) 16 May 12/3: Drunkenes in Hobart at present is almost confined to the ‘plonkos’ and ‘methos’.|
|Mirror (Perth) 17Dec. 4/3: Using disguises from a well-dressed woman [...] to a begging ‘plonko’ in the slums of Redfern.|
|Bobbin Up (1961) 221: Old Plonko Charlie [...] went behind the bobbin boxes, where he kept his bottle of bombo.|
|Bunch of Ratbags 69: We could go and see if there’s any plonkos under Martin’s Bridge and chuck rocks at ’em. [Ibid.] 73: I wonder why he’s got a comb; plonks never comb their hair.|
|Aussie Swearers Guide 67: Wine fanciers of all descriptions leave themselves open to being called plonk fiends or plonkos.|
|(ref. to 1920s–30s) Boozing out in Melbourne Pubs 15: Those who followed the Bacchic way were variously known as plonk fiends or artists, plonkos, winos, bombo bashers, winedots and wyandottes.|
|Guardian G2 1 June 2: A precocious premonition that his destiny was to be a plonkie.|
2. (Aus.) cheap wine.
|Argus (Melbourne) 10 Dec. 1/4: Are they out on the plonko again?|
|Golden Road to Cape Reinga 91: Members of the same race [...] who produce every possible kind of drink from Plonko Fino to passable Burgundy.|
|(con. 1945–6) Devil’s Jump (2008) 201: I drove straight over [...] stopping on the way for a bottle of plonko.|