pipe down

verb3

1. •
   To be quiet; to refrain from being noisy.

   • Pipe down, children. I'm trying to work.
2. •
   (slang) Of a man, to have penetrative sex with a woman.

   • Michael hurry up bro me and my girl wanna go home so I can pipe her down. — 2020
3. •
   To dismiss from muster, as a ship's company.