prostitution—1889 as ‘the most ancient profession in the world’ in On the City Wall, by Rudyard Kipling—was used earlier, with positive connotations, of various professions, especially agriculture
in a state of nudity—1732 as ‘in one’s birthday clothes’—refers to the naked condition in which a person is born—here, ‘birthday’ means ‘the day on which a person was born’
USA, 1888—an enigmatic, mysterious smile, reminiscent of that represented in the Mona Lisa, a portrait of Monna Lisa del Giocondo, painted by Leonardo da Vinci
1923: a small garment worn to cover the genitals—hence (1926): anything intended to conceal something regarded as shameful or indecent—from French ‘cache-sexe’, from ‘cacher’ (to hide) and ‘sexe’ (sex, genitals)
UK, 1803, as an adjective—UK, 1842, as a noun—in reference to the action or practice of attacking, or acting against, someone in a treacherous or underhand manner
Ireland, 1914—the action or practice of attacking, or acting against, someone in a candid or open manner, as opposed to deceptively or duplicitously—coined after ‘backstabbing’ (i.e., the action or practice of attacking, or acting against, someone in a treacherous or underhand manner)
an early account of a forced choice from a number of horses, associated with William Hobson (died 1581), a London haberdasher—itself adapted from earlier accounts, in which the main protagonist remained unnamed
UK, 1914: an apparent ability to sense or intuit the presence of nearby spiders—USA, 1963, in reference to Spider-Man: a supernatural ability or power to perceive things beyond the normal range of human senses
New Zealand (1890) & Australia (1891)—to terrify somebody—probably modelled on the earlier phrase ‘to knock seven bells out of somebody’ (‘to give a severe beating to somebody’)