◎费尽心机fèijìn xīnjī
(1) [rack one's brains in scheming]∶用尽了心思。形容千方百计地谋算
有时勿得惊人句,费尽心机做不成。——宋· 戴复古《石屏集·论诗绝句》
(2) [beat one's brains out…