ㄕㄚˋshàㄧㄡˇyǒuㄐㄧㄝˋjièˋshì

  1. 這麼一回事似的煞有介事描述半夜情形使大家毛骨聳然。」

to make a show of being very much in earnest (idiom)​, to act as if one is taking things very seriously
présenter qch en grande pompe, faire comme si c'était vrai
vorgeben etw. ernst zu nehmen (V)​