同歸於盡 [ㄊㄨㄥˊ ㄍㄨㄟ ㄩˊ ㄐㄧㄣˋ; tong2 gui1 yu2 jin4] to die in such a way that sb (or sth) else also perishes to take sb down with oneself to end in mutual destruction ◄ ►