first recorded in the United Kingdom in 1914, with reference to the civilizational implication of the German invasion of Belgium at the beginning of World War One; therefore, not first used by Orson Welles in Citizen Kane (1941)
UK, 1962—the time after which programmes unsuitable for children are broadcast on television—from the image of a dividing line between two different sorts of programmes
UK, 1788—denotes an auction in which the price is lowered by stages until a buyer is found—said to have been invented by the Dutch specifically as the best solution to selling tulip bulbs
‘double Dutch’, 19th century—from ‘Dutch’ in the sense of a language that few people can speak, and ‘double’ as a mere intensifier—‘High Dutch’, 17th century—loan translation from French ‘haut allemand’ (= ‘High German’), used in the sense of gibberish
USA—‘to go Dutch’ (1907): to have every participant pay their own expenses, or share expenses equally—via ‘to go Dutch treat’ (1887), from ‘Dutch treat’ (1873): a meal, etc., at which each participant pays their share of the expenses—from a German practice
UK, 1797—strength or confidence gained from drinking alcohol—alludes to the drinking habits ascribed to the Dutch—one of the phrases in which ‘Dutch’ is used derogatorily, largely because of the enmity between the English and the Dutch in the 17th and 18th centuries
UK, 1967—chiefly British—‘bums on seats’: the members of an audience, at a theatre, cinema or other place of entertainment, especially when viewed as a source of income
1916—from ‘brownie’, i.e. a benevolent elf that supposedly haunts houses and does housework secretly—not from the fact that the uniform of the junior Girl Scouts and Girl Guides is brown
first recorded in the Los Angeles Times (California) of 15 March 1951—possibly from ‘brownie’ in the sense of ‘a benevolent elf that supposedly haunts houses and does housework secretly’
USA, 1950s—The noun ‘doggy (or doggie) bag (or pack)’ denotes a bag, provided on request by the management of a restaurant, in which a diner may take home any leftovers; apparently, these leftovers were originally intended for the diner’s pet dog.