1691—to expose the flaws in something such as a law, a policy, an argument or a belief—these flaws are likened to holes large enough to drive a coach and horses through them
a person or thing, initially ugly or unpromising, that changes into something beautiful or admirable—New Zealand, 1848—from Hans Christian Andersen’s story about a supposed ugly duckling that turns out to be a swan
the Jerusalem artichoke—UK, 1968—blend of ‘fart’ and ‘artichoke’ in ‘Jerusalem artichoke’—refers to the flatulence caused by eating Jerusalem artichokes
to embark enthusiastically on a course of action that most sensible people would avoid—coined as ‘fools rush in where angels fear to tread’ by the English poet Alexander Pope in An Essay on Criticism (1711)
an event or occasion at which the expected principal participant is not present—coined after ‘Hamlet without the Prince’—‘Lear without the King’ 1904—‘Henry V without the King’ 1964
also ‘more than meets the ear’—meaning: more significance or complexity than is at first apparent—first used by John Milton as ‘more is meant than meets the ear’ in Il Penseroso (1645)
an oppressive, very confined or crowded space—UK, 1764—refers to the punishment cell at Fort William, Calcutta, in which, in 1756, the Nawab of Bengal reputedly confined British and Anglo-Indian prisoners