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
chiefly UK politics—a culture characterised by influential networks of close friends—from ‘chum’ (a close friend) and ‘‑ocracy’ (forming nouns designating forms of government or groups who exercise political or social power)
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
to make bigger or greater, to enlarge—UK, 1884, as a translation of ancient Greek ‘μεγαλύνειν’ as used in the Acts of the Apostles, 5:13—recoined in 1996 in the U.S. animated television series The Simpsons
an intelligence operative, also an intelligence operation—UK, 1966—from ‘sneaky’ (furtive, deceitful) and ‘beaky’ (referring to an overly inquisitive person, with allusion to a prominent nose)
a person who covertly exercises power by personal influence over a ruler or government without having any formal authority—ascribed to William Pitt the Elder by William Godwin in 1783