Insults:

You are so ugly she could scare the moss off a rock!
They say that two heads are better than one. In your case, one would have been better than none.
You're ski lift doesn't go to the top of the hill.
Your head whistles in a cross wind.
They say Will Rogers never met a man he didn't like, obviously he never met you.
Your mind is on vacation but your mouth is working overtime.
You are so ugly she could scare the chrome off a bumper!
There's two things I really hate about you: your face!
They say opposites attract. I hope you meet someone who is good-looking, intelligent, and cultured.
When you go to the mind reader, do you get half price?