a bad apple

A person who negatively impacts an entire group of people through his or her words or actions. Taken from the proverb "a bad apple spoils the bunch." Jeremy is really a bad apple. After five minutes with my usually well-behaved kids, they're all acting out.

a bad/rotten apple

one bad person in a group of people who are good You'll find the occasional rotten apple in every organization.

Common Names:

Name	Pronounced	Usage
Bastien	bas-TYAWN	French
Zulfiqar	-	Arabic
Treasach	-	Irish
Leoffl&Aelig;D	-	Anglo-Saxon
Achilles	ə-KIL-eez (English)	Greek Mythology (Latinized)
Khushi	-	Indian, Hindi