Just how stupid do you think I am?

I don't believe in one-word answers.

You're so stupid that when you get a brainstorm, it only drizzles.

You're so stupid that when you saw a sign saying "Dip Ahead," you stopped to get chips.

I don't know, but I hear your parents took out termite insurance on your head!

It depends on how early you get up in the morning.

You're so stupid you went to the drive-in movie to see "Closed for the Winter."

You're so stupid you saw a sign that said "Pay Toilet" and flushed a twenty-dollar bill.

I don't know, I haven't got a calculator.