Slender/Skinny- some muscle but wiry.
Toned/Lean- skinny but defined muscles.
Typical/Average- some muscle, some flab.
Ripped/Built- muscular with large muscles.
Brawny/Body Builder- extremely built with large muscles.
Chubby/Chunky- some muscle, more flab.
....and to avoid discrimination, although I doubt anyone will go for this one
Obese/Sumo style- very flabby.