subs. phr. (common).A six chambered revolver. SIX-SHOOTER HORSE = a swift horse.
1870. W. M. BAKER, The New Timothy, 177. The weapons of our warfare are not carnalbowie-knives, SIX-SHOOTERS, an the like.
1887. F. FRANCIS, Jun., Saddle and Moccasin, xviii. 310. A SIX-SHOOTER HORSE is a heap better than a six-shooting gun in these cases.
1900. R. H. SAVAGE, Brought to Bay, viii. With a quiet smile, as he loaded his SIX-SHOOTER freshly, for contingencies!