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open one's big mouth in French

open one's big mouth in French is ouvrir sa grande gueule.

open one's big mouth in French

ouvrir sa grande gueule
verb
(informal) To speak about things rashly or foolishly, when it would be better to stay silent.
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What is "open one's big mouth" in French?

"open one's big mouth" in French is ouvrir sa grande gueule.

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Translations from WikDict, CC BY-SA · example sentences from Tatoeba, CC BY 2.0 FR.