Wiktionary
dowager's hump
n. The hump-like projection seen on the back of older people caused by kyphosis of the spine, consequent to osteoporosis; especially seen in women.
Usage examples of "dowager's hump".
She was small, with a dowager's hump the size of a backpack and off-white hair that stood out around her head like dandelion fuzz.
An old woman with a dowager's hump stopped in front of me and let her little metal grocery cart come to a rest.
She was bent double under a dowager's hump, her hands gnarled with arthritis and grown to the chair's arms like gingerroot.
Even worse was the slight dowager's hump that prickled when she twitched her shoulders, trying to remember to slump.