hissy fit       
noun [ C ]  informal uk/ˈhɪs.i ˌfɪt/ us/ˈhɪs.i ˌfɪt/
 (突然的一阵)孩子气
a sudden period of uncontrolled and silly anger like a child's
  Sue threw a hissy fit when she found out. 当苏发现时,她耍了一阵孩子气。 
 
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