bad actor(redirected from a bad actor)
A person, animal, or element that is unreliable, unruly, and prone to troublesome or quarrelsome behavior. The class was full of bad actors, always fighting and causing trouble. The neighbors have quite a bad actor for a dog—it's constantly trying to fight with our dogs. A number of bad actors in the financial sector have been exploiting loopholes in the rules, making it much harder for those of us who do business legitimately.
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.