To talk grandly or boastfully despite having little knowledge or substance; to engage in empty rhetoric.
他总是喜欢在同事面前俭腹高谈，显得自己无所不知，但真正遇到问题时却束手无策。
He always likes to talk big in front of his colleagues, appearing to know everything, but when truly faced with problems, he is at a loss.
Era:
Early Modern
Frequency:
Next Idiom