A hissing sound made to express disapproval or rejection, or the act of hissing someone out.
Noun form derived from 'exsibilate,' using the '-ation' suffix to create an abstract noun for the action or sound of hissing.
In ancient Roman theaters, exsibilation was a weapon of mass criticism—if an actor was bad enough, an entire audience would hiss in unison, and there was no escaping that feedback!
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