下衆げすの後知恵あとぢえ

expression

hindsight is 20-20 (even for a fool); an afterwit is everybody's wit

Proverb meaning that even a foolish person can seem wise after the fact. Used to criticize someone who claims they knew something all along only after it happened.

• 失しっ敗ぱいしてから「やっぱりそうだと思おもった」と言いうのは、下げ衆すの後あと知恵ぢえだ。

  Saying 'I knew it all along' after a failure is just hindsight being 20-20.

• 彼かれのアドバイスはいつも下げ衆すの後あと知恵ぢえで、役やくに立たたない。

  His advice is always after-the-fact wisdom and never helpful.