活該 :
1.(coll.) serve sb.right
2.deservedly
3.ought
4.should
Relative explainations:
Examples:
1.如果他真地要你當眾收回?？?那你也是活該；你本不該那樣自吹自擂.
It serves you right if he did make you eat the leek in public; you should not be so boastful.
2.他揍了你我毫不同情——是你先打他的,你挨打活該.
I'm not sorry he hit you- it serves you fight for starting the fight!
3.我真是活該!
That's all I need!