cheat on
US /tʃiːt ɑːn/
UK /tʃiːt ɑːn/

1.
tradire, essere infedele
to be unfaithful to one's spouse or partner
:
•
He confessed to his wife that he had cheated on her.
Ha confessato a sua moglie di averla tradita.
•
She suspected her boyfriend was cheating on her.
Sospettava che il suo ragazzo la stesse tradendo.
2.
copiare, imbrogliare
to copy from someone else or use dishonest methods to pass an exam or test
:
•
The student was caught cheating on the exam.
Lo studente è stato colto a copiare all'esame.
•
It's not fair to cheat on your homework.
Non è giusto copiare i compiti.