USA, 1974—a moment of sudden realisation, enlightenment or inspiration—alludes to the representation of an illuminated lightbulb above a character’s head in a cartoon or comic strip, indicating that this character has had an idea
a situation that has been completely mismanaged—from ‘omni-’ and ‘shambles’—coined by Tony Roche in the British television series The Thick of It (3rd series, episode 1, 24 October 2009)
USA, 1978—to commit suicide; to demonstrate unquestioning obedience or loyalty—alludes to a mass suicide, in 1978, by members of the Peoples’ Temple in Jonestown, Guyana, who drank a cyanide-laced drink thought to be similar to Kool-Aid
USA, 1918—a mechanic—since the 17th century, ‘monkey’ has been used (frequently with modifying word indicating the occupation concerned) to denote a person engaged in a trade or profession
UK, 1963—‘Mr. Plod’, also ‘P.C. Plod’, ‘Plod’: a humorous or mildly derogatory appellation for a policeman or for the police—alludes to ‘Mr. Plod’, the name of the policeman in stories by the English author of children’s fiction Enid Blyton
UK, 1989—the practice of sending food destined for the British market for irradiation in a country, typically the Netherlands, where this process is permitted, in order to mask any bacterial contamination before it is put on sale—from ‘Dutch’ and the suffix ‘-ing’, forming nouns denoting an action