to intimidate somebody—UK, from 1958 onwards in books by Frank Norman (1930-1980)—also, the noun ‘frightener’ designates a member of a criminal gang who intimidates the victims of its activities
a factor speculatively included in a hypothesis or calculation, especially to account for some unquantified but significant phenomenon or to ensure a desired result—USA, 1947
to set someone thinking very hard or seriously, to give someone much food for thought—UK, 1889—loan translation from French ‘donner furieusement à penser’
the only option worth considering—USA, 1904—from the story (1894) of a man who is so addicted to faro that he takes part in a game despite knowing it to be rigged, because it is the only game available in town
USA—(1957) of computer data: incorrect or poor-quality input will produce faulty output—also applied (1964) to processes likened to computerised data processing
a group within a political party or other organisation, which presses for stronger or more radical policy or action—UK, 1916—the image is of providing ‘ginger’ (i.e., vigour) in a party or organisation
a person who seems eager to take on difficult or unpleasant tasks—UK, 1829—originally, in pugilistic slang, a fighter who “takes a deal of punishment before he is satisfied”