defined by Collins Dictionary as denoting “an extended period of instability and insecurity, especially one resulting from a series of catastrophic events”—first used in 1975 by the U.S. political scientist John Pearson Roche
a rebuke given in private by a wife to her husband—1625—from the idea that, in order to conduct herself properly, a wife was to rebuke her husband in secret only, i.e., in the privacy of their curtained bed
the affected dandyism of the writers, artists, etc., associated with the aesthetic movement, which advocated a doctrine of ‘art for art’s sake’—UK, 1879—coined by George Du Maurier in cartoons published in Punch
the political, military or economical threat regarded as being posed by certain peoples of South-East and East Asia, especially the Chinese and the Japanese—UK, 1895—loan translation from French ‘péril jaune’
meaning: a person cannot be expected to behave in a manner that is not in their character—numerous variants—first recorded in 1731 as ‘If we petition a Hog, what can we expect but a grunt’
(humorous and frequently ironic) determinedly or stubbornly independent—USA, 1841—apparently refers to the extreme helplessness of a hog (i.e., a pig) on the ice
self-righteously or sanctimoniously virtuous, or professing to be so—UK, 1834—alludes to the Book of Isaiah, 65:5: “Stand by thyself, come not near to me; for I am holier than thou.”