(政界的)高级官员，(军界的)高级将领，头头，要人

When are the brass hats going to start paying attention to the important things?

那些高级官员们准备要到什么时候才开始关注这些重要的事情吶？

A brass hat came up to me and asked me where I was going.

一位高级军官走到我跟前，问我要往哪儿去。

The brass collar is giving everyone a bonus at the end of the year.

头头准备在年底给大家发一笔奖金。

He，s the brass hat in Washington right now.

眼下他是华盛顿的要人。