plonko Austral. slang.
(ˈplɒŋkəʊ)
[f. plonk n.2 + -o2.]
One who is addicted to ‘plonk’.
| 1963 A. Marshall In Mine Own Heart 187 You end up a plonko with bells ringing in your head. 1965 W. Dick Bunch of Ratbags 69 We could go and see if there's any plonkos under Martin's Bridge and chuck rocks at 'em. |