UK—a general term of disapproval, meaning ‘unpleasant’, ‘dirty’, ‘nasty’, ‘ugly’, etc.—shortened form of ‘grotesque’—first recorded in (and popularised by) A Hard Day’s Night (1964), a musical comedy film starring the Beatles
UK, 1975—old-fashioned; out of date—perhaps a humorous alteration of the adjective ‘antique’, perhaps punningly after the adjective ‘wacky’—or perhaps derived from ‘Ann Twack’, rhyming slang for ‘crap’
UK, 1980—denotes someone or something that is unwelcome, unpopular, etc.—first recorded in a remark by the Scottish comedian Billy Connolly, but perhaps originated in Royal-Navy slang
USA, 1999—unfashionable or socially awkward in a way regarded as appealing or endearing—blend of ‘adorable’ and ‘dork’—the noun ‘dork’ denotes an odd, socially awkward, unstylish person
UK, 1933—a jump made with a parachute—hence also the verbal noun ‘brolly-hopping’ and the verb ‘brolly-hop’—‘brolly’ (university slang, late 19th century): a clipped and altered form of ‘umbrella’
USA, 1956—denotes a core principle, value, belief, characteristic, aspect, etc., of the U.S.A. or its citizens—more generally, the nouns ‘motherhood’ and ‘apple pie’ have been juxtaposed in enumerations of things and persons exemplifying U.S. values
On the pattern of phrases such as ‘nom de guerre’, ‘nom de théâtre’ and ‘nom de plume’, ‘nom de —’ is used, often humorously, to form phrases denoting a pseudonym, an alternative name.
UK, 1993—USA, 1987—the words ‘—— from hell’ are suffixed to nouns often referring to everyday life, such as ‘holidays’ and ‘neighbour(s)’, to make phrases denoting an exceptionally unpleasant or bad example or instance of ‘——’
USA, 1937—an uneasy sensation felt, especially in the stomach, as a result of nervousness or apprehension—based on the notion that the fluttering of butterflies may produce a similar sensation