[CHIEFLY BRITISH SLANG] Cheap or inferior wine.
Mum sips her wine. “This wine is divine, Hugo.”
“Divine’s the word for Montrachet seventy-eight,” says Dad. “You shouldn’t be spending your money on us, Hugo. Really.”
“I budget carefully, Dad. The office-drone work I do at the solicitor’s adds up. And after everything you’ve done for me down the years, I ought to be able to stand you a bottle of decent plonk.”
Definition from The American Heritage® Dictionary of the English Language, 4th Edition (via Wordnik)