DCHP-1 Online
buck rein 
a single rope attached to the hackamore of a bucking horse, to assist the rider to keep his balance.
- 1962 He gripped the soft cotton buck rein in one hand, raised the other high in the air as a signal to the men holding the chute gate closed, then spurred the horse. . . .
- 1962 He gripped the soft cotton buck rein in one hand, raised the other high in the air as a signal to the men holding the chute gate closed, then spurred the horse. . . .