rack your brain
US /ræk jʊər breɪn/
UK /ræk jʊər breɪn/
1.
quebrar a cabeça, pensar muito
to think very hard to remember something or to find a solution to a problem
:
•
I had to rack my brain to remember her name.
Tive que quebrar a cabeça para lembrar o nome dela.
•
We've been racking our brains all day trying to solve this puzzle.
Estivemos quebrando a cabeça o dia todo tentando resolver este quebra-cabeça.