The act of intentionally misrepresenting your appearance on Facebook to hide that you are fat. This person will engage in the act of photo manipulation such as cropping out anything below the shoulders in pictures. The lower half of their body would show that they are clearly not hot, but they are more concerned with keeping up with appearances on Facebook than hitting an elliptical.
Guy1: Who is that girl with ----- in that picture? She's hot.
Guy2: That girl!? Don't let her fool you, she is always fakebooking.