Thinking of all possible responses after walking away from an argument

Question

I am searching for a phrase for the feeling that you have when you walk away from an argument and think of all the responses that you could have said. I remember that my friend told me that there was a very specific phrase for it, involving "escalier" but I cannot remember the rest. Any help would be appreciated.

Answer 1

It's called esprit d'escalier, which has an interesting origin.

Answer 2

You are certainly thinking about l'esprit de l'escalier.