What is a Wisconsin cheesehead?

A "cheesehead" is someone who is a fan of the Green Bay Packers. Since Wisconsin is the cheese state and many of the bigger farms are in or near Green Bay, we are considered the cheeseheads. You will see many people wearing cheesehats at Packer games. If you go to a Wisconsin store you can also find cheese colsters, toys, hats, and more goodies involving cheeseheads or the Packers.