hired gun
US /ˈhaɪərd ˌɡʌn/
UK /ˈhaɪərd ˌɡʌn/

1.
pistoleiro, mercenário, assassino de aluguel
a person whose services can be bought, especially a mercenary or assassin
:
•
The company brought in a hired gun to deal with their legal troubles.
A empresa trouxe um pistoleiro para lidar com seus problemas legais.
•
He was known as a hired gun, always ready to take on dangerous assignments for a price.
Ele era conhecido como um pistoleiro, sempre pronto para assumir missões perigosas por um preço.