beat your brains out
US /biːt jʊər breɪnz aʊt/
UK /biːt jʊər breɪnz aʊt/

1.
memerah otak, berfikir keras
to think very hard about a problem or question, often without success
:
•
I've been beating my brains out trying to solve this puzzle all day.
Saya sudah memerah otak cuba menyelesaikan teka-teki ini sepanjang hari.
•
Don't beat your brains out over it; let's just ask for help.
Jangan memerah otak terlalu banyak; mari kita minta bantuan saja.