to act in a dishonest way in order to gain an advantage, especially in a game, a competition, an exam, etc.
تقلب کردن, کلک زدن, حقهبازی کردن, دغلکاری کردن
(British English)Have you ever cheated in an exam?
(North American English)Have you ever cheated on an exam?
You're not allowed to look at the answers—that's cheating.
Anyone caught cheating will be automatically disqualified from the examination.
Why would anyone want to lie or cheat?