死定了

死定了:

Literally means:

be sure to die; be sure to get in to trouble

Actually means:

定, sure and unchangeable. This phrase means that death is looming inevitably towards someone or some animal or plant. It means that someone or something is doomed to bad results or to meeting something bad.

Sometimes used as a warning or threat.

定，确定不变。死定了，认定某人或某一种动植物难以避免或逃脱死亡。认定会碰到坏事情或坏结果。

适用于人或事物。有时用来表示警告或威胁。