Obviously the thief had simply walked out this way as bold as brass.

显然贼人是从这里大摇大摆出去的。

《新英汉大辞典》

Once he is here, he won't leave; he just sits there as bold as brass.

他一来了就不走，死皮赖脸地坐在那儿。

《新英汉大辞典》

The man must be as bold as brass to have stolen money at mid-day.

这男子胆大包天，居然在中午光天化日下偷钱。

youdao

It was wonderfully deft in its controlled daring: a lieutenant colonel baiting a rear admiral in public was a scary tightrope act, even in a community as notably hostile to Navy brass as the Marines.

NEWYORKER: Rat Beach

He rejected as "brass neck" the executives' rejection of the report, in which they blamed the government for Rover's failure.

BBC: War of words over Rover collapse

By using friendly but authoritative online reps who identify themselves as company brass, these marketers hope to make a sale--or at least a sales pitch.

FORBES: Crowd Control