根据语境可以理解为
你完蛋了,你注定这样了,你就这命了.
n.（名词）A decision or judgment,especially an official condemnation to a severe penalty.
判决：尤指官方的重大判决或定罪
Fate,especially a tragic or ruinous one.
命运：命运,尤指厄运或劫数
Inevitable destruction or ruin.
不可避免的破坏或毁灭
Judgment Day.
最后审判日A statute or ordinance,especially one in force in Anglo-Saxon England.
法规：尤指盎格鲁-撒克逊时期生效的法规或命令
v.tr.（及物动词）
doomed,doom.ing,dooms
To condemn to ruination or death.See Synonyms at condemn
使毁灭或判…死罪参见 condemn注定要造成不愉快的结局