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

1.
trair, ser infiel
to be unfaithful to one's spouse or partner
:
•
He confessed to his wife that he had cheated on her.
Ele confessou à esposa que a havia traído.
•
She suspected her boyfriend was cheating on her.
Ela suspeitava que o namorado a estava traindo.
2.
colar, trapacear
to copy from someone else or use dishonest methods to pass an exam or test
:
•
The student was caught cheating on the exam.
O aluno foi pego colando na prova.
•
It's not fair to cheat on your homework.
Não é justo colar na sua lição de casa.