I never think of somthing to say at the time however after I do except for one occasion when I was already angry lol.....

I was at the hospital with my son ( who had all sorts of problems from OCD to ADHD ) when this woman I knew from his school came up to me in the accident and emergncy room with her daughter from my sons class, she said 'my daughter just said oh mummy look its that naughty boy from my class' I replied really fast that my son had said 'oh look mummy there is that ugly girl from my class'.

You sould of seen her face it was a picture lol.