Some years ago, I ran across the term "esprit d'escalier." It's a phrase from the French "esprit de l'escalier" and translates as "staircase wit." It's used to refer to thinking of the perfect response or retort when it's way too late to use it.
It's a handy phrase that on the few occasions I've wanted to refer to, I could never remember.
Is there a phrase for remembering the phrase esprit d'escalier on the stairs?