/ ˈkaʊbɔɪ; NAmE / noun
1.
a man who rides a horse and whose job is to take care of cattle in the western parts of the US :
cowboy boots
2.
a man like this as a character in a film / movie about the American West :
children playing a game of cowboys and Indians
3.
( BrE , informal , disapproving ) a dishonest person in business, especially sb who produces work of bad quality or charges too high a price
For more information see the Cultural Guide