a mean, ill-tempered, troublemaking, or evil person.
a vicious animal.
an inveterate criminal.
Not All Bad: 7 Ways “Bad” Can Be GoodPeople (and Thesaurus.com) have known for a while that sometimes being bad is really, really good—especially in the bad phrases below. Carry on.
Origin of bad actor
First recorded in 1940–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019