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to beat one's brains out
01
to try one's best in order to solve a problem or to understand it
![to [beat] {one's} brains out definition and meaning](https://cdn.langeek.co/photo/29665/original/?type=jpeg "to [beat] {one's} brains out definition and meaning")
Idiom
Informal
Example
He's been beating his brains out trying to finish that project on time.
She beat her brains out studying for the exam, but it was just too difficult.
