stool pigeon
US /ˈstuːl ˌpɪdʒ.ən/
UK /ˈstuːl ˌpɪdʒ.ən/
1.
告密者, 線人
a person who acts as a decoy or informer, especially for the police
:
•
The police used a stool pigeon to gather information on the gang.
警方利用告密者收集幫派信息。
•
He was accused of being a stool pigeon for the authorities.
他被指控是當局的告密者。