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
(1836) stormy ocean tracts between latitudes 40° and 50° south—(1867) the fifth decade of life—(1888) the 1840s—(1913) the stretch of Broadway through Times Square, in New York City—(nautical slang) naval commanders aged between 40 and 50 who ‘roar’ commands
Irish English, 1829—‘in a fortunate or prosperous state’—a loan translation from Irish ‘ar mhuin na muice’, meaning, literally, ‘on the pig’s back’, and, figuratively, ‘in a fortunate or prosperous state’
USA, 1922—flappers’ slang: the sum of money that a flapper carried as a precaution so as not to be left financially helpless in case she and her boyfriend got ‘mad’ at each other while on a date
Australia, 1996—a day spent in bed in order to restore one’s spirits; an unscheduled extra day’s leave from work, taken to alleviate stress or pressure and sanctioned by one’s employer—from ‘Doona’, a proprietary name for an eiderdown or duvet, hence a generic term for any eiderdown or duvet