Adam is incredibly jowly and has a double chin. He is very careful about shooting his body, but when he and Gary were on their cruise and went to the spa, you could clearly see how chubby his arms and chest are. Additionally when they did that baffling QVC video before Christmas, the shirt he was wearing looked painted on.
There's nothing wrong with being overweight from a moral standpoint. There is something wrong with being overweight from a health standpoint, but some people just choose to be heavy. Which is fine.
Adam is overweight.