‘blouson noir’: meaning and origin

in French contexts: a young person, especially a young man, belonging to a youth subculture of the 1950s and 1960s—UK, 1959—from the noun ‘blouson’ (a short jacket) and the adjective ‘noir’ (black)

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‘Dunning-Kruger effect’: meaning and origin

a bias whereby people who have little ability in, or knowledge of, a particular task or subject tend to overestimate their capabilities—USA, 2008—refers to David Dunning and Justin Kruger, who described this bias in the Journal of Personality and Social Psychology in 1999

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‘mauvais coucheur’: meaning and origin

a difficult, uncooperative or unsociable person—UK, 1829—from French ‘mauvais coucheur’, literally ‘bad bedfellow’, with original allusion to a person whom a traveller had to share a bed with when stopping over at an inn

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‘Bloody Caesar’: meaning and origin

a drink consisting of vodka and Clamato juice—Canada, 1969—coined after ‘Bloody Mary’—this drink is said to have been invented by bartender Walter Chell

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