Meaning of the word "bad apple" in English

What does "bad apple" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

bad apple

US /bæd ˈæp.əl/
UK /bæd ˈæp.əl/
"bad apple" picture

Idiom

1.

a person who creates problems or causes trouble for others in a group

Example:
One bad apple can spoil the whole barrel.
The manager had to fire the bad apple in the team to maintain morale.
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