to  beat  one's brains out
beat
bi:t
bit
<i>one's</i>
wʌnz
vanz
brains
breɪnz
breinz
out
aʊt
awt

英語での「 beat one's brains out」の定義と意味

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
慣用句
くだけた
I've been beating my brains out over this equation all afternoon. 
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