rack your brain
US /ræk jʊər breɪn/
UK /ræk jʊər breɪn/
1.
devanarse los sesos, romperse la cabeza
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.
Tuve que devanarme los sesos para recordar su nombre.
•
We've been racking our brains all day trying to solve this puzzle.
Hemos estado devanándonos los sesos todo el día tratando de resolver este rompecabezas.