"bold as brass" in Chinese (Simplified)
厚颜无耻大胆无畏
Definition
以非常自信且通常毫不在意他人看法的态度行事，有时近乎厚颜无耻。
Usage Notes (Chinese (Simplified))
属于口语，既有批评，也可带调侃或佩服。常描述某人公开、肆无忌惮地做事，如“进来厚颜无耻”。注意和‘confident’（自信）区分，更多强调‘不在乎别人看法’。
Examples
He walked in bold as brass and sat down without asking.
他**厚颜无耻**地走进来，毫不犹豫地坐下。
She answered the teacher bold as brass, not afraid at all.
她**大膽无畏**地回答老师，一点也不怕。
My little brother told a lie and stood there bold as brass.
我弟弟撒了谎，还**厚颜无耻**地站在那里。
She marched up to the front of the line bold as brass and ordered first.
她**厚颜无耻**地走到队伍前面，抢先下单。
He just took my seat, sat there bold as brass, and pretended nothing happened.
他直接坐了我的座位，**厚颜无耻**地坐着，好像什么都没发生。
She denied everything, just stood there bold as brass and smiled.
她什么都否认，**厚颜无耻**地站着笑。