hornet's nest
noun [ C usually singular ] uk/ˌhɔː.nɪts ˈnest/ us/ˌhɔːr.nɪts ˈnest/
（尤指引起公愤的）麻烦，困境
a very difficult or unpleasant situation, especially in which a lot of people get very angry and complain
His remarks about the lack of good women tennis players stirred up a (real) hornet's nest. 他那番关于缺少优秀女子网球选手的言论可真是捅了马蜂窝。