mayhem       
noun [ U ] uk/ˈmeɪ.hem/ us/ˈmeɪ.hem/
 混乱状态
a situation in which there is little or no order or control
  With 20 kids running around and only two adults to supervise, it was complete mayhem. 20个孩子到处乱跑却只有两个大人看管,局面完全是一片混乱。 
 Synonym: havoc