To act by any means necessary, regardless of morality or ethics.
择选择。指为了达到目的，什么手段都使得出来。
鲁迅《三闲集·通信》要谋生，谋生之道，则不择手段。”
He would use any means, fair or foul, to win the contract.
Learn the next connected idiom: 不择手段 (bù zé shǒu duàn) → 断章取义 (duàn zhāng qǔ yì)
Want to explore more random idioms? Try our 🎲 Chinese Idiom Generator