ground shaker

/ˈɡraʊndˌʃeɪkər/
noun
  1. Something that causes a powerful physical shaking of the ground, such as an earthquake or a large explosion.
    • The demolition team set off a controlled ground-shaker to bring down the old building.
    • The ground-shaker registered a magnitude of 7.2 on the Richter scale.
    • People ran out of their houses after the ground-shaker hit the town.
  2. A person, event, or thing that causes a major change or strong reaction; a game-changer.
    • The discovery of the ancient city was a ground-shaker for historians.
    • Her speech was a ground-shaker that made everyone rethink their priorities.
    • The new smartphone was a real ground-shaker in the tech industry.
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