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
(literally): to fall heavily; (figuratively): to fail completely—UK, 1847—‘cropper’ may be derived from ‘crop’ in the phrase ‘neck and crop’ (1791), which originally referred to a heavy fall
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
love or affection insincerely professed or displayed as a means of gaining a benefit or advantage—circa 1665—the image is of love given in return for food from a cupboard
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’
to react with shock or dismay, especially in response to something considered immoral, underhand or vulgar—USA, 1990—from an episode of the sketch-comedy television series In Living Color, broadcast on 15th April 1990