pipe down

US /paɪp daʊn/
UK /paɪp daʊn/
"pipe down" picture
1.

安静, 住嘴

used to tell someone to stop talking or to be quiet

:
Will you two just pipe down? I'm trying to concentrate.
你们两个能安静点吗?我正在努力集中注意力。
The teacher told the noisy students to pipe down.
老师让吵闹的学生们安静下来