swayback
sway·back
adjective
1.
having abnormal sagging of the spine (especially in horses)
Origin
From sway + back.
Related words
Word family
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.