he could buff me out

[jacdac]

Everyone believes I’m going to have a heart attack, Scott thought. You’d think whatever antic providence decided it would be interesting to make me lose weight could have at least buffed me out a little, but no.
Source: Elevation by Stephen King
Context: The character, Scott Carey, is losing weight in a supernatual and mysterious way. In addition to losing weight gradually, he weighs the same irrespective what additional heavy objects he carries in his pockets.

What does buff me out mean?

Thank you.

 

[Glasguensis]

This is not a standard expression as far as I know - if I had to take a guess I would assume that it referred to unclogging his arteries.

 

[se16teddy]

I think it refer to this sense of the adjective buff:
10 physically attractive; muscular. buff - WordReference.com Dictionary of English

One would have thought that if one lost weight one would tend to appear more attractive and muscular.

The subject of "buffed me out" is "antic providence", not a "he".

 

[kentix]

I think it refer to this sense of the adjective buff:
10 physically attractive; muscular. buff - WordReference.com Dictionary of English

One would have thought that if one lost weight one would tend to appear more attractive and muscular.

But "no", in his case.