Sometimes the meaning depends on perspective, sometimes a perspective of age.
I was about 170 at 5-10 in high school, solid swimmer bod with minimal fat (profile pic in towel) so filling out back then was my chest developing naturally when I hit my early 20s.
Now heading towards my 60s, though I tend to have a fat face anyway, my concern is keeping my face filled out as I get rid of this too-many-deaths-depression weight (got 20 off, yay, 10 to 15 more to go) because sometimes older guys who keep their bf percentages too low tend to get gaunt looking in the face and I don't want that on me. I'd rather have the fat.
Sometimes I see a guy obsessing about his body fat when his face looks skeletal because as we age we tend to lose subcutaneous fat, or it shifts elsewhere, yikes, and I can't help but to think that they should go eat a sammich.
I was talking about losing more weight with one of my neighbors who I do walks with and she expressed the same thing, that I shouldn't take off any more weight or my face might get gaunt. But I think I can take off at least 10 more so working in that direction and I'll see if I like the look. Even if your bod is healthy, which can be maintained without extreme low bf, there's just something about that gaunt look that seems to age a person visually before their time. So I prefer my face filled out even if that means a waist also more filled out than I'd otherwise prefer.