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
1750—the non-academic inhabitants (‘town’) of a university city and the resident members of the university (‘gown’, denoting the distinctive costume of a member of a university)
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’
a person or thing that is insignificant or contemptible—1910—originally (1900): a type of small high-velocity shell, with reference to the high-pitched sound of its discharge and flight
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)
to abandon or betray someone in order to protect or advance one’s own interests—originally (British politics, 1971) ‘to push someone under a bus’—derived from ‘to walk under a bus’ (British politics, 1966)
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
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