Repartee
(Click to see the full idea-toon)
Based on a true story!
Okay, only a part of it…my words, that is. Mercifully the guy (unlike the cartoon dude) is smart enough to get the point and wise enough to guffaw. But for those specimens that are not and who guile you with their bad intentions, here’s putting pretentious linguistics to good use! 
If this works for you, here’s some more repartee. And there’s more where those Idea-toons came from!
Would you mind if I use your retort in practical life?
If you wish, I can send them a link to your site as well.
Good one.
@rakhi: Fire away!