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slang An alcoholic, especially one who doesn't tend to their own personal welfare; a drunken lout. Don't look now, but there's some plonko staggering his way over to us. Her husband has been nothing but a plonko wandering from pub to pub ever since he lost his job 10 years ago.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. a drunkard. (see also plonk.) Get that smelly plonko out of here!
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.