pipe down

Etymology
The sex sense is related to.

Verb

 * 1)  To be quiet; to refrain from being noisy.
 * Pipe down, children. I'm trying to work.
 * 1)  To dismiss from muster, as a ship's company.
 * 2)  Of a man, to have penetrative sex with a woman.
 * 1)  To dismiss from muster, as a ship's company.
 * 2)  Of a man, to have penetrative sex with a woman.

Translations

 * Arabic: هَدَأَ
 * German: ,