a discontented, troublemaking, or dishonest person: In any group of average citizens there are bound to be a few bad apples.
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 apple
from the proverb “one bad apple spoils the barrel”
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019