cold-back noun 2adjective 1forms 2 noun2 •A syndrome in which a horse refuses to accept anything on its back (often a symptom of chronic lower back soreness)It is difficult to compare the human counterpart of what Jeffcott describes as another 'well known' problem in horses, namely, "cold-back". — 1980 •A horse with cold-back."Guess he's a cold-back," Slim observed when Blackie had calmed down somewhat. — 1996 adjective1 •Refusing to bear weight on its back; bucking and shying when anything is put on the back.A cold-back bronc raises his head up high as a single cowboy walks toward him to mount in the cold morning air. — 1995 formscold backs · cold-backs