People, usually girls who may just be skinny because they just ARE. They might even eat, but still be skinny. It could even be due to a fast metabolism. It's hard to tell sometimes if someone has an eating disorder or if they have a fast metabolism and eats a lot, but is thin. Don't make fun of every skinny person you see! You could be wrong!
Girl 1: "Damn girl! Do you freaking even eat? You're so fucking skinny! Go eat, you ANOREXIC BITCH!"
Girl 2: "What the fuck is your problem? I eat so much, I just have a fast metabolism. That means I have a huge appetite, but don't gain much at all. So I'm naturally skinny you idot. Bitch!"