虎入羊群

Explanation: Tiger ran into the flock. Weak to strong metaphor into the middle of any person stabbed. 　　Usage: The main predicate; as object; negative, suggesting an analogy in the strong bullying the weak wanton 　　Source: Ming Luo, "Three Kingdoms" 11 back: "Jung saw Taishi Ci and Guan, Zhang in time to kill Zeizhong, such as Huruyangqun, vertical and horizontal mo when, out of the city will Qubing." Thesaurus:  Fox into barton, Hu Dang flock