Bart: You're going down, Homer. I'm gonna fool you! Homer: You talk better than you fool. Bart: I'll fool you up real nice. Homer: You couldn't fool your mother on the foolingest day of your life if you had an electrified fooling machine.
Homer: (Wearing glasses) The sum of the square roots of any two sides of an isosceles triangle is equal to the square root of the remaining side! Man: (From inside a bathroom stall.) That's a right triangle, you idiot! Homer: D'oh!