"A collection of insults 80" joke

Why don't you go to the library and brush up on your ignorance?

I hear you changed your mind! What did you do with the diaper?

You have an inferiority complex -- and it's fully justified.

You are not as bad as people say -- you are worse!

Do you have to leave so soon? I was about to poison the tea.

I'm busy now. Can I ignore you some other time?

Whom am I calling "stupid"? I don't know. What's your name?

Take a vacation; go to Club Dead.

Your mouth is getting too big for your muzzle.

You are as strong as an ox and almost as intelligent.

You are living proof of reincarnation. No one could possibly get to be so stupid in just one lifetime.

You grow on people -- like a wart!