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’)
USA, 1826, as ‘to flog somebody like seven bells’—to give a severe beating to somebody—‘seven’ is perhaps simply an arbitrary intensifier—cf. phrases such as ‘like seven bells half-struck’ (‘with as much speed as possible’) and ‘to blow seven bells’ (‘to blow a violent gale’)
USA, 1924—a questionable or unorthodox practice that has long been established—from literal uses (19th century onwards) referring to former Spanish colonies in America
used in a situation in which someone is recognised by a person or persons whom he or she does not know or recognise—1722 in Colonel Jack, by Daniel Defoe—1656 with ‘the clown’ instead of ‘Tom Fool’