en boucher un coin

== French == === Etymology === (This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.) === Pronunciation === IPA(key): /ɑ̃ bu.ʃe œ̃ kwɛ̃/, (more formal) /ɑ̃ bu.ʃe.ʁ‿œ̃ kwɛ̃/ === Verb === en boucher un coin (informal) to astonish, to knock for a loop [with à ‘someone’] Synonyms: impressionner, épater