straight shooter
US /ˈstreɪt ˈʃuːtər/
UK /ˈstreɪt ˈʃuːtər/

1.
直言不讳的人, 坦率的人
a person who is honest and direct in their speech and actions
:
•
You can always trust Sarah; she's a real straight shooter.
你总是可以信任莎拉;她是个真正的直言不讳的人。
•
My boss is a straight shooter, so I always know where I stand.
我的老板是个直言不讳的人,所以我总是知道自己的立场。