四凶 sìxiōng Four Perils
(literary) Four legendary malevolent clan leaders or spirits banished during the time of emperors Yao and Shun, specifically 混沌 hùndùn, 穷奇 qióngqí, 梼杌 táowù, and 饕餮 tāotiè; often used to describe cruel and greedy officials.