事后诸葛亮,中文俗语,意思是指事后自称有先见之明的人、马后炮(be wise after the event; second guesser),带有贬义。

诸葛亮是三国时期蜀汉丞相(the Prime Minister of the state of Shu Han during the Three Kingdoms period),政治家、军事家、文学家、书法家、创造家,被觉得是三国时期最杰出的策略家(the most accomplished1 strategist of his era)。

例句:

事后诸葛亮每人会做。

It is easy to be wise after the event.

你也不过是事后诸葛亮, 干吗批评人家?

Why criticize other people when you once knew no better yourself?