put a sock in it

• stick a sock in it
• stuff a sock in it

Possibly from a crude means of muffling a record player's speaker.

put a sock in it (third-person singular simple present puts a sock in it, present participle putting a sock in it, simple past and past participle put a sock in it)

1. (figuratively, informal, humorous, idiomatic) To stop talking; to be quiet; to shut one's mouth.

   He went on and on until I finally told him to put a sock in it.

• See also Thesaurus:stop talking

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