When a person, usually a female, takes a profile picture for their social networking site profile picture where you can't tell what they exactly look like.
The term became popular when MySpace was and a video went viral about the risks of MySpace. In one of the pictures on the video, a woman who looked like Big Foot took pictures to make her look good.
Man One: "I think she fine!"
Man Two: "Fool, she got the myspace curves! She probably fat as fuck!"