He is pulling your chain. Anyone that attempts that is risking ALOT! Bad tissue scarring, not to mention the possibility of a VERY bad and possibly lethal skin infection. Never attempt surgical procedures on yourself or anyone else unless you are a certified surgeon. Not to mention, to do so is illegal.
The proper procedure is called a “Body tuck”, and requires about 6 hours of surgery(by qualified doctors, not some hot scissor weilding quack). Most plastic surgeons can perform this surgery. Average cost is around $10-30K.
There is a much better option. Building more lean muscle mass to replace the lost fat. During a hike, you are rapidly building lean muscle mass as long as your diet provides necessary muscle building nutrients. This muscle can and will replace the space that the fat previously occupied. Many people dont think about the differences between weighing 200 lbs of fat, or 200 lbs of muscle. If you replace fat with muscle, you may not lose much “weight” but your body and overall health is going to be much better off with the weight in the form of muscle vs fat.
bryan