Insult: If you were any dumber,…

Insult: If you were any dumber, your head would implode.
Response: If you were a little bit more intelligent you'd still be stupid.
Jokes, +1:
A boy with a monkey on his shoulder was walking down the road when he passed a policeman who said, "Now, now young lad, I think you had better take that monkey the zoo." The next day, the boy was walking down the road with the monkey on his shoulder again, when he passed the same policeman. The policeman said, "Hey there, I thought I told you to take that money to the zoo!" The boy answered, "I did! Today I'm taking him to the cinema."