A centerfold is a big picture in the middle of a magazine or newspaper that is so big it takes up two whole pages! It usually shows a person who is famous or really pretty or important in some way. Some people like to hang centerfolds on their walls because they are so cool to look at. But sometimes centerfolds can be a little bit naughty or show people without any clothes on, so it's important to remember that those kinds of pictures are only for grown-ups to look at!