tomber sur un bec

== French == === Etymology === Literally, “to come across a beak”. === Pronunciation === IPA(key): /tɔ̃.be sy.ʁ‿œ̃ bɛk/ === Verb === tomber sur un bec (informal) to hit a snag, to find a fly in the ointment Synonym: tomber sur un os ==== Conjugation ==== see tomber