为虎作伥

为虎作伥 [wèi hǔ zuò chāng]

1. ■ play the jackal to the tiger; abet one's enemy; act as the paws of the tiger; assist the evildoer; hold a candle to the devil; help an evil man (do evil); help a villain do evil; help the tiger to pounce on [upon] its victims:

土豪劣绅的狗腿子为虎作伥， 欺压百姓。 The local bully's henchmen were his agents in oppressing the people.