cheater

noun
  1. A person who acts dishonestly or unfairly in order to gain an advantage, especially in a game or examination. noun
    The cheater was caught using a hidden device during the exam.
    He was known as a cheater in the poker community, always finding ways to manipulate the game.
  2. A person who is unfaithful to a spouse or partner. noun
    She discovered that her partner was a cheater after finding suspicious messages on his phone.
    Being labeled as a cheater, he struggled to rebuild trust in his relationship.
  3. A device or strategy used to deceive or gain an unfair advantage. noun
    The software was considered a cheater, giving players an unfair edge in the game.
    Using a cheater in the competition was against the rules and led to disqualification.