1889 18 July 1/6 Broncho ‘busting’ and base-ball are the sports most indulged in [in] these times.
1891 July 208/1 Bronco busting is a distinct art.
1911 H. Quick xii. 301 I had been asked to give a exhibition of broncho bustin.
1931 L. Steffens i. i. 9 A gun-playing, broncho-busting vaquero.
1963 7 June 5/7 Attend a bronco-bustin' rodeo.