The word “tsunami” was used a lot in the past to describe a trend or momentum in a market.
Then a real tsunami hit in December 2004. Hundreds of thousands died and more than 1 million people lost their homes. Suddenly we didn’t throw that term around as much anymore (well, except for some people: “[Jim] Cramer…called the latest baseball tech breakthrough a ‘tsunami’ and the ’single best example of the Mobile Internet.’”)