OK, I saw the Matrix again, this is a term from there:
http://matrix.wikia.com/wiki/Residual_self_image
The medical term for what I am getting at might be something like "proprioception" though?
Basically my "sense" for my body is nothing like it looks. Even though I've been overweight for 15 years now, I still knock things over with my hips, catch my clothes on door handles. I guess its kind of like wearing a padded costume all the time, you will seem clumsy all the time, but I never have gotten "used" to it.
When I look in a mirror or a picture of me, there is disparity with how I look and how my mind thinks I look. I think that guy in the mirror it picture isn't me. Just doesn't look right.
It goes deep too, when I imagine myself daydreaming or in a real dream, I don't see the overweight guy, I see the guy I was 15 years ago, I don't do this on purpose.
I know it's kind of hard to describe, but does anyone know what I am talking about?
When I meet goals I hope that my residual self-image might more closely match my actual self.