hidden agenda
noun [ C ] uk/ˌhɪd.ən əˈdʒen.də/ us/ˌhɪd.ən əˈdʒen.də/
隐秘的动机，不可告人的理由
a secret reason for doing something
[ + to infinitive ] The prime minister denied that the new visa requirements were part of a hidden agenda to reduce immigration. 首相否认实行新的签证规定的背后目的之一是要减少移民。