open one's big mouth

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open one's big mouth

/ˈəʊ̯.pən ˌwʌnz bɪɡ‿maʊ̯θ/
/ˈəʊ̯.pən ˌwʌnz bɪɡ‿maʊ̯θ/ UK
/ˈoʊ̯.pən ˌwʌnz bɪɡ‿maʊ̯θ/ Canada, US
/ˈəʉ̯.pən ˌwɐnz bɪɡ‿mæɔ̯θ/ Australia
/ˈɐʉ̯.pən ˌwɐnz bəɡ‿mæʊ̯θ/ New Zealand
/ˈo.pən ˌwʌnz bɪɡ‿mʌʊ̯θ/ Scotland
/ˈoː.pen ˌwənz bɪɡ‿məwt̪/ India
/ˈoː.pen ˌwənz bɪɡ‿mɑwt̪/ India

verb opens one's big mouth · opening one's big mouth · opened one's big mouth

informal To speak about things rashly or foolishly, when it would be better to stay silent. Grr, why do I always open my big mouth after doing something wrong?

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verb speak when it would be better to stay silent

Français	ouvrir sa grande gueule

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MLA

"open one's big mouth." Wiktionary, via Micwyn, micwyn.com/word/open%20one's%20big%20mouth. Accessed 7 Nov. 2026.

APA

open one's big mouth. (n.d.). In Wiktionary, via Micwyn. Retrieved November 7, 2026, from https://micwyn.com/word/open%20one's%20big%20mouth

Chicago

"open one's big mouth." Wiktionary, via Micwyn. Accessed November 7, 2026. https://micwyn.com/word/open%20one's%20big%20mouth.

BibTeX

@misc{open_one_s_big_mouth_2026,
  title = {open one's big mouth},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/open%20one's%20big%20mouth},
  urldate = {2026-11-07}
}