Origin of cow horse
An Americanism dating back to 1850–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for cow horse
The last course in the education of a cow-horse is cutting cattle out of a mixed round-up.
Whenever you can strip the bridle off, while cutting out a beef, and handle your steer, that's the top rung a cow-horse can reach.
Mauchacho had instantly responded to the tight, resisting hand upon the bridle and stood taut as a cow-horse.The Brand
On a cold morning a cow-horse does not like to be very tightly cinched or girthed up.Ranching, Sport and Travel
Leaving the cow-horse to hold the riata tight, Phil sprang from his saddle and ran to the fallen man.When A Man's A Man
Harold Bell Wright