cheater
nounUK /ˈtʃiː.tər/
US /ˈtʃiː.t̬ɚ/
A cheater is someone who breaks the rules to win.
The teacher caught the cheater looking at another student's test.
OTHER MEANINGS
2. A person who acts dishonestly to gain an advantage in a game or contest.
Everyone booed the cheater who moved the pieces when no one was looking.
3. A person who is unfaithful to a partner.
She found out her boyfriend was a cheater.
4. A device or trick used to gain an unfair advantage, especially in a video game.
He downloaded a cheater program to get unlimited coins.