UK, late 1980s—the adverb ‘o’clock’ is colloquially and humorously used with adjectives to denote an unreasonably, excessively or inconveniently early or late hour—as in ‘stupid o’clock’, ‘silly o’clock’, etc.
music characterised by excessive or extravagant riffing—USA, 1975—from ‘riff’ (a short repeated musical phrase) and ‘-orama’ (used to form nouns designating a display, event, etc., of considerable size or expanse)
UK, 1963—with reference to the Beatles, a pop and rock group from Liverpool: the fact, or state, of being, or of resembling, a member of the Beatles; the world of the Beatles
1755: a musical performance in which each participant plays or sings a different tune—1759: a confused or discordant medley—one of several phrases in which the adjective ‘Dutch’ is used derogatorily or derisively
UK, 1916—a scrawny girl or woman—may have originated in the title of a successful song (and in the name of an equally popular character) created in 1911 by the comedienne Lily Long
the quality or fact of being from New Zealand; characteristics regarded as typical of New Zealand or New Zealanders—coined in 1967 by the U.S. Professor of Psychology Eugene Leonard Hartley
USA, 1931—indicates that something has been formulated or devised hurriedly, roughly or carelessly, as though sketched or scribbled on the back of an envelope