Australia, 1944—jocular—denotes the Yarra River, which flows through Melbourne, Victoria—alludes to the brownish colour of this river, the image being that the mud is on the top, not at the bottom, of this river
Australia, 1847—an odd-job man—‘wood-and-water’ alludes to the phrase ‘hewer of wood and drawer of water’, designating a labourer of the lowest kind—‘joey’ is perhaps the noun denoting a young kangaroo, and by extension anything young or small
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, 1974—applied jocularly to any supposed network of prominent or influential Welsh people, especially one which is strongly nationalistic—a blend of ‘Taffy’, denoting a Welshman, and ‘Mafia’
used of a person who is frozen with fright or surprise, or is trying to flee, as a result of suddenly becoming the focus of attention—alludes to the habit of deer and rabbits of stopping still when dazzled by the headlights of a motor vehicle, or of running away within the headlight beam