/KAH-muhn in-FAWR-mer/ – Phrase
Definition: người mật báo, người chỉ điểm, người tố cáo.
A more thorough explanation: A common informer is a person who brings a legal action on behalf of the government against someone who has violated a law, typically in exchange for a share of any fines or penalties imposed on the defendant.
Example: The common informer filed a lawsuit against the company for violating environmental regulations.