It's loose skin and some water/fat
On a serious note, bashing free, Greg is one of those xamples of do's and don't's of using growth hormone and steroids.
You can be healthy and succesfull using them, but you can also **** your self up.
Those
substances don't just effect on your heart and liver and testicles etc, but everything you have. You can totally become looking like an offspring of a retarded frog squerl or something.
Greg would possibly place dead last in a natural bodybuilding competition at his current physical state.
That is my oppinion when I look at greg.