[f. BUCK v.3] Of a horse: That bucks or buck-jumps.
1859. H. Kingsley, G. Hamlyn, II. 212. [He] can sit some bucking horses which very few men will attempt to mount.
1875. Madisonian, 19 June, 2/3. When you ’stradle one of them [saddles], it would bother the worst kind of a bucking bronco to spill you out.
