머리를 굴려요 · 머리를 굴렸어요 · 머리 좀 굴려 봐
to rack one's brain; to think hard (sometimes slyly)
Example
아무리 머리를 굴려도 좋은 방법이 생각나지 않아요.
No matter how hard I rack my brain, I can't think of a good way.
Word parts
Literally 'to roll one's head' — keeping the brain turning.
Good to know
Can sound sly, implying someone is calculating for their own benefit.