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A person who gets so mad when someone else becomes successful that they lose their mind and start yelling at the whole world.
My cousin got a job at McDonald's and my H. A. T. E. R. S. cousin started screaming at me in the hallway.
When my neighbor won the lottery, my H. A. T. E. R. S. neighbor threw a couch out the window.
My H. A. T. E. R. S. coworker called me a failure after I got promoted.