A French term used in English for the predicament of thinking of the perfect reply too late.
As in, I thought of my perfect, pithy retort only after I'd reached the stairs after my meeting...
I heard this from Matt Mullenweg of WordPress fame on the Farnam Street podcast. It's a great episode, if you haven't heard it.
I bring it up the phrase because a.) it's an awesome idiom and b.) it's worth considering whether you provide enough time for yourself and others to stew on feedback. I think I maintain the worst balance: not enough time for most decisions and way too much time, enough to second guess myself, on others. I've found, like Matt, writing is helping push me in the right direction.