/
ˈrəʊdɪəʊ, 
rə(ʊ)ˈdeɪəʊ/
n.
 (pl. rodeos)
  - an exhibition or contest in which cowboys show their skill at riding broncos, roping calves, etc. 
▸an exhibition or contest demonstrating other skills, such as motorcycle riding.
 - a round-up of cattle on a ranch for branding and counting.
 
v.
 (rodeos, rodeoing, rodeoed)
 compete in a rodeo.
Etymology
C19: from Sp., from rodear ‘go round’.