qua cầu rút ván

== Vietnamese == === Etymology === Literally, "to pull off the planks once you crossed the bridge". === Pronunciation === (Hà Nội) IPA(key): [kwaː˧˧ kəw˨˩ zut̚˧˦ vaːn˧˦] (Huế) IPA(key): [kwaː˧˧ kəw˦˩ ʐʊk̚˦˧˥ vaːŋ˦˧˥] (Saigon) IPA(key): [waː˧˧ kəw˨˩ ɹʊk͡p̚˦˥ vaːŋ˦˥] ~ [waː˧˧ kəw˨˩ ɹʊk͡p̚˦˥ jaːŋ˦˥] === Verb === qua cầu rút ván (idiomatic, derogatory) to be treacherous