ㄊㄨㄥˊㄍㄨㄟˊㄐㄧㄣˋtóngguīyújìn

同归于尽
  1. 一同毀滅死亡 男女一時想不開同歸於盡行為」。

to die in such a way that sb (or sth)​ else also perishes, to take sb down with oneself, to end in mutual destruction
gemeinsam ruiniert sein