DCHP-1 Online
buffalo horse Hist. 
a horse or pony trained for hunting buffalo.
See also: buffalo runner (def. 1)
- 1933 . . . a trained buffalo horse would generally keep out of the way of furious or wounded buffalo.
- 1952 The trained buffalo horse, regarded by frontiersmen as the most intelligent animal that ever lived on the Plains, was high-strung, "spooky," and impossible to hold once the killing run started; he knew his own job and expected his rider to take care of himself.
- 1933 . . . a trained buffalo horse would generally keep out of the way of furious or wounded buffalo.