1794—from French ‘terroriste’ (1794): during the French Revolution, adherent or supporter of Robespierre’s faction, who advocated and practised the Terror (methods of partisan repression and bloodshed in the propagation of the principles of democracy and equality)
‘scruple’—from Latin ‘scrūpŭlus’, literally ‘a small sharp or pointed stone’—probably because such stones used to get into the open shoes of the Romans, ‘scrūpŭlus’ came to denote ‘a pricking, uneasy sensation’, hence ‘trouble’, ‘doubt’, ‘scruple’
USA, 1956—acronym from ‘white Anglo-Saxon Protestant’—‘Wasp’, or ‘WASP’: a person who belongs to, or is thought of, as being part of a white, upper middle-class, northern European, Protestant group that dominates economic, political and cultural activity in the USA
The phrase ‘boys in the backroom’, or ‘backroom boys’, appeared in the 1920s as a U.S. political term denoting persons exercising a surreptitious influence. The Oxford English Dictionary is therefore mistaken in saying that it originally denoted, in 1941, persons engaged in research.
‘Backward in coming forward’ means ‘reluctant, shy to do something’. The earliest instances that I have found are about funds set up in order to provide aid to soldiers wounded during the Napoleonic Wars.
From Japanese ‘taikun’, ‘tycoon’ was originally the title by which the shogun of Japan was described to foreigners. The current sense originated in the Japanese Embassy to the United States in 1860, not from the use of ‘tycoon’ as a nickname of Abraham Lincoln.
During the Cold War, especially in the context of a possible nuclear war, ‘better red than dead’ was used to warn against uncompromising opposition to communism, while ‘better dead than red’ was used to express unconditional opposition to communism.
‘Reds under the bed’ and variants denoted an exaggerated or obsessive fear of the presence and harmful influence of communist sympathisers in a particular society, institution, etc. The earliest instance that I have found is from the Chicago Tribune of 28th September 1924.
Of American-English origin, ‘gravy train’ is first recorded in 1899 with reference to sporting achievement, not to financial gain; it originated in the use of ‘gravy’ in the figurative sense of ‘advantage’, ‘benefit’, first recorded in 1845.
Often used in phrases such as ‘to jump on the bandwagon’, meaning to join the popular or apparently winning side, ‘bandwagon’ denotes a popular party, faction or cause that attracts growing support; its primary meaning is a wagon used for carrying the band in a parade.