(go/work) under cover / undercover
Note: This expression is especially used with police, law enforcement and private investigation. The phrase can be used as a verb or an adjective.
This expression can be written as one or two words. It's often written as one word when its used before a noun.
— See that woman who looks like a prostitute? She’s really a police officer working under cover.
— Many security guards at the shopping mall work under cover.
— The reporter went under cover for more than six months while doing a story on international child trafficking.
— Much of the work catching illegal drug smuggling is done under cover.
— My father is an undercover police officer who tries to infiltrate criminal organizations or find information about their operations.
— I'm applying for an undercover role and my husband is really upset about it.
— The movies really have made the life of someone working under cover seem very glamourous but it is difficult work.
— Ugh. I just found out my girlfriend went under cover on social media to learn about my ex-girlfriend. She doesn't trust me and now I don't trust her either.
— In the movie Mr and Mrs Smith, Brad Pitt is an undercover assassin who is unknowingly married to and living with Angelina Jolie, who also works under cover as an assassin.
— My son works under cover for the CIA. I never thought he'd become an undercover agent.
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