Synonyms for Humpbacked (same or very similar meaning)
WordNet sense 1 (characteristic of or suffering from kyphosis, an abnormality of the vertebral column):
gibbous, humped, hunchbacked, crookback, crookbacked, kyphoticWordNet sense 2 (not in good physical or mental condition; out of condition):
unfitFrom the ODE community, based on WordNetadd/edit