Maybe if Big Show hadn't have felt the need to cram down 10-packs of hot dogs in one sitting like he used to be known to do backstage, he wouldn't be such a fat shit now.
In WCW, he was in phenominal shape until the last few months there. I heard the WWF paid for him to get liposuction before he debuted with them.
But yeah, don't blame Big Show's inhuman size for his fatness. He made the decision to shovel all sorts of shit down his mouth which made him put on 84 pounds of fat since his WCW debut. He was a ripped 424 when he debuted with WCW, and now weighs 508.
I'll never forget him walking to the ring on Raw during his first WWF Title run with the belt around his waist. Midway down the ramp, the belt snapped off of him.