Now, hopefully this thread won't warrant removal, if it does then I apologise in advance.
This thread is for the wittiest, most intelligent insult you have heard or given out.
Now, much like most people, I'm not terribly witty or at least variable when it comes to insulting (if at all), usually I won't get maybe one witty insult before just resorting to hurling abuse and other objects at the other person standing near me even if they aren't the ones involved.
However the best insult I have heard of was a situational one, it apparently was uttered in a school workshop, where tech or electronics or woodwork/metalwork was taught (depending which age you come from). One pupil saw a screw in the wooden desk, then said to another:
"Hey, that is you, screwed by a boy."
Now on the face of it isn't terribly witty, until the put both his feet and face in it when he replied, much to his embarrassment:
"But it could have been a girl."
For me that has always stuck in my mind ever since I had heard it but like I have said I'm sure there are much wittier insults. So what are the most wittiest you have heard?
Have just noticed the title is too long should be heard/thought 'OF'. 
