real events and situations are often more remarkable or incredible than those made up in fiction—first occurred as ‘truth is always strange, stranger than fiction’ in Don Juan (1823), by George Gordon Byron
alludes to the belief that such a hat or cap protects the wearer from mind control, surveillance or similar types of threat—USA, 1972 as ‘tinfoil-lined hat’
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)
scarce; infrequent; difficult to find or to come by—one early use in 1668—but popularised by the Irish author Thomas Campbell in The Pleasures of Hope (1799)
to be glad of minor benefits, especially in an otherwise unpleasant or troublesome situation—first recorded in The Heart of Midlothian (1818), by Walter Scott
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
UK, 1856—jocular extension of ‘to rain cats and dogs’ (i.e., ‘to rain very hard’)—puns on the verb ‘hail’ (i.e., ‘to pour down like hail’) and the verb ‘hail’ (i.e., ‘to call out (a cab)’)