暢ㄔㄤˋ所ㄙㄨㄛˇ欲ㄩˋ言ㄧㄢˊchàngsuǒyùyán

简畅所欲言

  1. 盡情、痛快地把想說的話都說出來。例 「班會上，學生暢所欲言地表達意見」。

英lit. fluently saying all one wants (idiom)​; to preach freely on one's favorite topic, to hold forth to one's heart's content
法dire ce qu'on a à dire, vider son sac