Australia, 1865 (nonce-use): the process of turning into a person of high social rank—UK, 1964 (coined by sociologist Ruth Glass): the process whereby middle-class people take up residence in a traditionally working-class area of a city
the final four months of the calendar year, i.e., September, October, November and December—UK, 1863—from ‘-ember’ in ‘September’, ‘November’ and ‘December’
inauthentic archaic language, especially as affected by authors of historical novels—UK, 1867—alludes to the fact that, in the 19th century, Wardour Street, in London, became known for its many shops specialising in imitations of antique furniture
UK, 1975—an upper-class and fashionable, but conventional, young woman in London—blend of ‘Sloane Square’, the name of a square located in an affluent area of London, and ‘Lone Ranger’, the name of a well-known hero of western stories and films
a nickname given to London, which has, since the collapse of the Soviet Union, attracted Russian oligarchs—also used earlier in reference to Communism—modelled on Russian city names such as ‘Leningrad’ and ‘Stalingrad’
UK, 1819—has been used in various jocular phrases referring to alcohol consumption—punningly alludes to ‘lush’, which, as a noun, denotes alcoholic drink, and, as a verb, means to consume alcohol—‘the City of Lushington’: a convivial society, consisting chiefly of actors, which met at the Harp Tavern, London
UK, 1997—the title given to the official resident cat of the Prime Minister of the United Kingdom at 10 Downing Street, London—‘mouser’, first recorded circa 1440, denotes an animal that catches mice
Australia, 1909—(horseracing) a bet is sure to pay off; (in extended use) something is a very strong probability—from the notion that the punter is so confident of winning the bet that he is prepared to put the whole city of London on a horse to win a brick, i.e., a ten-pound note
UK, 1897—‘Piccadilly window’: a monocle—hence ‘Piccadilly-windowed’: monocled—alludes to ‘Piccadilly’, the name of a street and of a circus (i.e., a rounded open space) in London