chink in someone's armor
US /tʃɪŋk ɪn ˈsʌmwʌnz ˈɑːmər/
UK /tʃɪŋk ɪn ˈsʌmwʌnz ˈɑːmər/

1.
brecha na armadura, ponto fraco
a weakness or vulnerability in someone or something that is otherwise strong or well-protected
:
•
The prosecutor found a chink in the defendant's armor during cross-examination.
O promotor encontrou uma brecha na armadura do réu durante o interrogatório.
•
Despite his confident exterior, there was a chink in his armor when it came to public speaking.
Apesar de sua aparência confiante, havia uma brecha em sua armadura quando se tratava de falar em público.