cowboy

US /ˈkaʊ.bɔɪ/
UK /ˈkaʊ.bɔɪ/
"cowboy" picture
1.

a man, typically one who rides a horse and tends cattle, especially in the American West.

:
The cowboy expertly roped the calf.
He dressed up as a cowboy for the party.
2.

a reckless or irresponsible person, especially in business or politics.

:
He's a real financial cowboy, taking huge risks with other people's money.
The company was run by a bunch of marketing cowboys.