Health, physical condition. Chiefly with in and modifying adjectives, as in good liking, in better liking, etc. Obsolete.
in good (also bad) looks: having a favourable or unfavourable appearance; appearing in the specified manner. Also in one's best (also worst) looks…
Put for: Quantity or excess of flesh; hence, plumpness, good condition, embonpoint, esp. in phrases, to get, (†get oneself in), lose flesh; also (…