Example of use: “Tell the kids to pipe down. I can’t hear the TV!”
Interesting fact
The origin of the expression ‘pipe down’ is nautical. Whistled signals are given to
crews via a boatswain’s pipe, with one of those signals meaning “time to go
below decks and retire for the evening,” or “be quiet as it’s time for bed.”
This has been used since the late 16th century.