From Wiktionary, the free dictionary
Literally, "to miss a fine opportunity to be silent."
- IPA(key): /pɛʁdʁ yn bɛl ɔ.ka.zjɔ̃ də s(ə) tɛʁ/
perdre une belle occasion de se taire
- to put one's foot in one's mouth; to run one's mouth; to speak to one's detriment when one could have avoided commenting
