cheat · verb I or T /tʃiːt/
cheat
B2 to behave in a dishonest way in order to get what you want
Dictionary examples:
Anyone caught cheating during the test will be immediately disqualified.
She was caught cheating on her French exam.
He cheats at cards.
Learner example:
She also didn't want to cheat during the exam because it wouldn't be fair to anyone. (First Certificate in English; B2; Hungarian)
cheat on sb
B2 to have a secret sexual relationship with someone who is not your usual sexual partner
Dictionary example:
She found out that Jeremy had been cheating on her.
Learner example:
In Cancun, I met another cute guy and I cheated on my boyfriend with him but that was just an affair, that did not mean anything to me. (First Certificate in English; B2; Spanish)