wine, especially cheap wine of inferior quality—UK, 1973—from ‘château’ (as used in names of expensive wines of superior quality made at vineyard estates) and ‘plonk’, denoting cheap wine of inferior quality
Particularly in Australian English, with reference to the phrase ‘not to care a bugger’, meaning ‘not to care at all’, the noun ‘imbuggerance’, also ‘embuggerance’, denotes ‘absolute indifference’.
to do everything possible to achieve a result or effect—UK, 1865 (as ‘to pull out a few more stops’)—alludes to pulling out all the stops of an organ in order to produce a full and thrilling sound
something of no value, something to which one is utterly indifferent—UK, 1785—derives from a misinterpretation of “Worth makes the Man, and Want of it the Fellow;/The rest, is all but Leather or Prunella.” in An Essay on Man (1734), by Alexander Pope
a person who now preserves the interests that he or she previously attacked—UK, 19th century—but the notion occurred in Chaucer’s Physician’s Tale and ‘the greatest deer-stealers make the best park-keepers’ in The Church-History of Britain (1655)
used of any never-ending or arduous task—UK, 1923—alludes to the huge task of maintaining the painted surfaces of the railway bridge over the Firth of Forth, in central Scotland
UK, 1971—a pun on ‘Kensington Gore’, the name of a thoroughfare in London, and on the noun ‘gore’, denoting blood shed from a wound—it is unclear whether ‘Kensington Gore’ (as applied to artificial blood) was originally a trademark
UK, 2022— translates French ‘girouette de fer’—a derisive nickname for Liz Truss, in reference both to ‘Iron Lady’ (a nickname for Margaret Thatcher) and to Liz Truss’s changing views on a variety of subjects