1906 (of a motor vehicle): to operate with maximum power, to function at its best—1907 (of a person or thing): to perform at peak level, to be on top form—conversely, 1910: ‘to miss/misfire on all cylinders’
something likened to the RMS Titanic in being vast and supposedly indestructible yet heading inevitably towards disaster—USA & Australia, May 1912, in the phrase ‘political Titanic’
to engage in pointless or futile activity in the face of disaster—USA, 1969—apparently first used, and perhaps coined, by Elizabeth Carpenter, press secretary for the wife of President Lyndon B. Johnson
the smaller, perceptible part of something which is evidently much larger—USA, 1912—refers to the fact that floating ice has about 88 per cent of its mass submerged—does not seem to refer to the sinking of the Titanic
UK, 1935—a humorous self-contradictory phrase which includes the clichéd phrase ‘to avoid like the plague’ in order to express the necessity of avoiding clichés—as a piece of advice for writers, has itself become a cliché
USA 1920: ‘to have the brains of a goldfish’ (to have limited intelligence)—USA, 1958: ‘to have the memory of a goldfish’ (to be unable to retain information or memories for any significant length of time)
American English, 1874—used in particular of stupidity, as in ‘dumb as a bag of hammers’ and variants—the underlying notion is probably that anything is dumb that does all the hard work
the principle that, where an effective legal system is absent or does not apply, brute strength and self-interested ruthlessness are what determine success, ownership, etc.—USA, 1878—predates Kipling’s Jungle book