wèi​hǔ​zuò​chāng

to help a villain do evil

Senses

为虎作伥/ 為虎作倀 wèi​hǔ​zuò​chāng to help a villain do evil

(idiom) to act as an accomplice to a villain; to abet an evildoer. From a legend where a person killed by a tiger becomes a ghost who helps the tiger find more victims.

References

synonym 为虎作伥/為虎作倀 助纣为虐/助紂為虐
synonym 为虎作伥/為虎作倀 助桀为虐/助桀為虐
synonym 为虎作伥/為虎作倀 为虎傅翼/為虎傅翼
antonym 为虎作伥/為虎作倀 为民除害/為民除害
see 伥鬼/倀鬼 为虎作伥/為虎作倀