“轩然大波”，汉语成语，字面意思是“ mountainous waves”，比喻大的纠纷或乱子，指不好的影响。可以翻译为“a great disturbance; a big dispute; a crisis”等。

例句：

没料到芝麻大的事儿竟会引起这样一场轩然大波。

Who could have thought a trivial matter would cause such a stir?