noun

(especially in the western US) a man who herds and tends cattle, performing much of his work on horseback.

they are always playing cowboys and Indians

cattleman,cowhand,cowman,cowherd,herder,herdsman,drover,stockman,rancher,gaucho,llanero,ranchero,vaquero,cowpuncher,cowpoke,broncobuster,buckaroo,herd

verb

work as a cowboy.