Having too much flesh
In personal appearance he was tall and corpulent, of a dignified presence and extremely powerful physique, with a bald forehead, close-cropped hair and short moustaches.
Since Prince Andrew had last seen him Kutuzov had grown still more corpulent, flaccid, and fat.
His whole short corpulent figure with broad thick shoulders, and chest and stomach involuntarily protruding, had that imposing and stately appearance one sees in men of forty who live in comfort.
All of which suggests a personality mentally and physically phlegmatic, a suggestion strengthened by the fact that Bartholomaeus de Neocastro (quoted by Wenck) describes him as corpulent in 1290.
I am not corpulent, nor am I robust in any way.