double dealing

/ˈdʌbəl ˌdilɪŋ/
noun
  1. The act of being dishonest or deceitful, especially by pretending to support one person or group while secretly helping another.
    • In the spy novel, the agent's double-dealing kept everyone guessing about his true loyalties.
    • Her double-dealing was exposed when both sides of the negotiation realized she had been sharing their secrets.
    • The politician was accused of double-dealing when he promised to lower taxes but secretly worked to raise them.
adjective
  1. Characterized by deceit or dishonesty; acting in a way that is not trustworthy.
    • The company's double-dealing practices finally caught up with them when the lawsuit was filed.
    • She discovered her double-dealing friend had been spreading rumors about her behind her back.
    • The double-dealing salesman sold the same car to two different people on the same day.