[f. BUCK sb.1] intr. Of a horse: To leap vertically from the ground, drawing the feet together like a deer, and arching the back. Also trans. To buck off. Cf. BUCKJUMP.
1859. [see BUCKING vbl. sb.3].
1880. A. C. Grant, in Blackw. Mag., Feb., 164/2. This kid … assists immensely in keeping a rider down in the saddle when a horse bucks heavily.
1881. Cheq. Career, 38. He bucked me off more times than I can remember.
