1607, as ‘as snug as pigs in pease-straw’—especially in ‘(as) snug as a bug in a rug’, phrases built on the pattern ‘(as) snug as [animal name] (in —)’ mean ‘in an extremely comfortable position or situation’
to upset, to overturn—1777—origin unknown—perhaps based on Spanish ‘capuzar’, meaning ‘to sink (a ship) by the head’—or perhaps based on a Provençal compound of ‘cap’, meaning ‘head’
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
1922—‘like death warmed up’ (also ‘like death warmed over’): extended form of ‘like death’, attested in the mid-17th century and meaning ‘extremely ill’, or ‘exhausted’
1922, slang of high-school and university students in Kansas City (Missouri) and in Kansas: a fashionable young man who enjoys socialising with women at tea parties or other social events—1924: a diplomat employed by the U.S. State Department, regarded as being excessively occupied with entertaining dignitaries and doing little meaningful work
meaning: ‘what is appropriate in one case is also appropriate in the other case in question’—earliest occurrence in A Collection of English Proverbs (1670), by John Ray
increasingly strange—alludes to Alice’s Adventures in Wonderland (1865), by Lewis Carroll—first occurs from 1878 onwards in novels by Margaret Wolfe Hungerford
1762: the time of night when it is said that witches are active and supernatural occurrences take place—alludes to ‘the witching time of night’ in Shakespeare’s Hamlet—also (1985): the last hour of trading each month when exchange-traded stock options expire
1793—probably ultimately after post-classical Latin ‘mille viae ducunt homines per saecula Romam…’ (‘a thousand roads lead for ever to Rome the men…’)—the metaphor occurred in A Treatise on the Astrolabe (ca 1391), by Geoffrey Chaucer
(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