>You know those perfect replies you always think of about five minutes too late?
L'esprit de l'escalier or l'esprit d'escalier (UK: /lɛˌspriː d(ə l)ɛˈskæljeɪ/, US: /lɛˌspriː d(ə ˌl)ɛskəˈljeɪ/,[1] French: [lɛspʁi d(ə l)ɛskalje]; lit. 'staircase wit') is a French term used in English for the predicament of thinking of the perfect reply too late.
Lifelong sufferer myself.