bad actor
Americannoun
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a mean, ill-tempered, troublemaking, or evil person.
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a vicious animal.
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an inveterate criminal.
Etymology
Origin of bad actor
First recorded in 1940–45
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
“The thing I’m most worried about right now is actually bioterrorism,” Bancel said, and specifically a bad actor using AI to build a respiratory virus cheaply.
From The Wall Street Journal ● Sep. 25, 2026
By this, I don’t mean to call Damon a bad actor.
From Salon ● Aug. 2, 2026
Distributors are asked to provide the metadata for each individual song, which makes it possible for a bad actor to submit music using an existing artist's name, or one with a very similar spelling.
From BBC ● Jul. 27, 2026
The data are largely public and often used by campaigns and researchers; a bad actor would have to take further steps to affect an election.
From Los Angeles Times ● Jul. 17, 2026
He had looked strangely comical, like a bad actor auditioning for a solemn part in a play.
From "The God of Small Things" by Arundhati Roy
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Get a wordDefinitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
