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Phrase(s): beat one’s brains out (to do something)
to try very hard to do something. • If you think I’m going to beat my brains out to do this, you are crazy. • I beat out my brains to do this for you! • I won’t beat my brains out again for you!, Phrase(s): beat someone’s brains out
1. to hit or batter someone severely. • She threatened to beat my brains out. • Those thugs nearly beat his brains out. 2. to drive oneself hard (to accomplish something). • I beat my brains out all day to clean this house, and you come in and get dirt on the carpet! • Don’t beat your brains out. Just give it a good try.
McGrawhill's American Idioms And Phrasal Verbs