I don’t know if in his case abs are singular or nonexistent. Sure, it’s a lot of weight. He’s very strong, but not really healthy. I lift weights, but you can’t be a fatty and healthy even pushing iron.
I have to believe he has some very strong abs (or 'ab', as I called it) -- its just that they are buried within that thick protective coat of insulation. Heaving all that weight around can't allow for a weak midsection.
Reminds me of the USSR gold medalist in power lifting from 1972 (I think -- possibly 1968). Alexi something or other I believe. Similarly ... 'impressive' abdominals. The sportscasters kept insisting it was 'all muscle'. I was very young at the time, and I still thought the TV talking heads were spouting nonsense. Blubber is blubber. Doesn't take away the fact that he was very strong -- but that midsection protrusion sure didn't look like any muscle group that I was familiar with.