partner in crime

A partner in crime is a person who regularly helps someone else to plan a crime. A bank robber might tell her partner in crime to wait outside in the getaway car.

The phrase partner in crime means accomplice — anyone who assists with the plotting or actual committing of a criminal act. You'll often find partner in crime used in a less serious way, though: "Okay, two piece of pie are missing. Who's your partner in crime?" If a friend collaborates with you on your practical jokes (or even just hangs around with you a lot), she's your partner in crime.

Definitions of partner in crime
  1. noun
    someone who assists in a plot
    synonyms: collaborator, confederate, henchman
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    type of:
    accessary, accessory
    someone who helps another person commit a crime
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