Itserveshimright, he shouldn't have broken the rules.
该，谁叫他不守纪律。
《新英汉大辞典》
2
Yes, itserveshimright.
是啊，他是活该。
3
When we use a phrase like 'itserveshimright', we are, in part, admitting that a certain set of circumstances has enabled justice to act of its own accord.