I think I heard it once... Some one was like talking to my best friend and was like: "She is NOT normal." I have no idea what it means. I'll ask him, if you want the answer that badly. He lives in Vermont now. It is pronounced nor-MUL, right?
See, in this world, the way I see it if you're normal you're weird because being normal is a rare and boring trait. And if you're weird, its pretty normal because no one's sane these days. But that doesn't answer your question. Normal is a rare trait in which through the laws of physiology isn't existent since each and every man is 'special' in their own way.