‘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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notes on ‘wave’ (i.e., crowd motion)

USA, 1981—said to have been invented by cheerleader ‘Krazy George’—popularised worldwide during the 1986 FIFA World Cup in Mexico, as a translation of Spanish ‘ola’—hence the British phrase ‘Mexican wave’ (1986)

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the biblical origin of ‘to go the extra mile’

meaning: to try especially hard to achieve something or do it well—originally ‘to go the second mile’—alludes to the gospel of Matthew, 5:41: “And whosoeuer shall compell thee to goe a mile, goe with him twaine”

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