1. Something or someone that causes a major disturbance, upheaval, or significant change; a person or event that shakes the foundations of society, politics, or culture.
Usage: Often used metaphorically or in literary contexts; Can refer to a person, discovery, or event
2. In classical mythology, an epithet for Poseidon, the god of the sea and earthquakes.
Usage: mythological; archaic or literary

Examples

• The invention of the internet was an earthshaker that transformed global communication.
• Her groundbreaking research proved to be an earthshaker in the field of medicine.
• The political scandal was an earthshaker that shook the nation's confidence in government.
• In Homer's epics, Poseidon the earthshaker commands respect and fear.
• The discovery of penicillin was an earthshaker for modern medicine.
• His bold ideas made him an earthshaker in the world of technology.