I got this thread idea from the "quotes" topic. (viewtopic.php?f=17&t=3158).
I'll start off:
"Sure, I've seen people like you before - but I had to pay an admission..."
"You're red shirt goes well with your eyes..."
"Save your breath...You'll need it to blow up your date."
"Calling you an idiot would be an insult to all the stupid people."
"Folk clap when they see you...but they clap their hands over their eyes."
"You're about as much use as a Betamax videorecorder."
"All day I thought of you....I was at the zoo."
"You should learn from your parents mistakes - try using some birth control."
"If I was as ugly as you were, I wouldn't say Hi to folk, I'd say BOO!"
"You've got the perfect weapon against muggers - yer face."
"I heard that you went to the haunted house and they offered you a job."
"Sure, I'd love to help you out...now, which way did you come in?"