a rotten apple

A person who negatively impacts an entire group of people through his or her words or actions. Taken from the proverb "a rotten apple spoils the bunch." Before you accuse the entire department of wrongdoing, you should try to find the rotten apple that initially caused the problem.

Common Names:

Name	Pronounced	Usage
Kelebek	-	Turkish
Crane	[krein]
Rustam	-	Kazakh, Uzbek, Azerbaijani, Tajik
Sigibert	-	Ancient Germanic
Dalitso	dah-LEE-tso	Southern African, Chewa
Jokin	-	Basque