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
1950—‘grasshopper’ and its shortened form ‘grassy’, typically used in the plural, denote a tourist, especially a visitor to Canberra—the image is that a coachload of tourists is similar to a swarm of grasshoppers
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
Australia, 1950—a traffic warden in the state of New South Wales—‘brown’ probably refers to the colour of those traffic wardens’ uniform—‘bomber’ may refer to the fact that many of those traffic wardens were originally war veterans; or perhaps to the Australian-English use of the noun ‘bomb’ for an old car
UK, 1912—humorous: a Jewish person—refers to the Crossing of the Red Sea, as recounted in the Book of Exodus—coined on various occasions by different persons, independently from each other
Australia—meaning: (as a verb) to rest or spend time in an aimless, idle way; (as a noun) an instance or period of resting—origin: Army slang, Second World War, from the notion of lying on one’s back
Australian soldiers’ slang, 1917—literally: to fall heavily; figuratively: to suffer a failure or defeat—‘gutser’ (Scotland, 1901): originally denoted a belly flop—derived from ‘gut’ in the sense of the belly