Questioning her decision was like stirring up a hornet's nest—she instantly turned aggressive.

hornet的意思是"大黄蜂"，一种具有强烈攻击性的蜂类。 hornet's nest字面意思是"大黄蜂的巢"，比喻"容易引发激烈反应的敏感问题或局面"，就像捅了马蜂窝会招致蜂群攻击一样。