(n.) A crooked back; one who has a crooked or deformed back; a hunchback.

bowlegs cleft palate clubfoot crookback defacement deformation deformity disfigurement flatfoot freakishness harelip humpback hunchback knock-knee kyphosis lordosis malconformation malformation misproportion misshape monstrosity mutilation splayfoot swayback talipes teratology torticollis truncation valgus wryneck