you know when you think of all those great things you could have said. after the fact... well now you can! here is a place to let all the eloquent replies that failed to make it through the "oh yeah!"
The French have this phrase, l'esprit d'escalier. Literally, it translates as "the spirit of the staircase" but what it actually means is "the things you think of to say after it ’s already too late and you ’re on your way out."

http://ohyeah.tribe.net