open one's mouth

idiom

Definition of open one's mouth

: to speak He says something stupid every time he opens his mouth.

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Dictionary Entries Near open one's mouth

open one's mind

open one's mouth

open out

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Cite this Entry

“Open one's mouth.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/open%20one%27s%20mouth. Accessed 24 Oct. 2021.

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