Sunk "cost"

What is sunk cost??? I'm not economic lecturer so I don't need to explain it, ok? HAha..
Well... BITA exam finally over... Guess wat?? 50% can pass la.. But still, sunk cost.. Hehe...

I really hate exam so much.. Few days back, i'm also having bad mood with no reasons..
My face had became so horrible, maybe because I'm too stress or what also I don't know.. All I wish to do is sleep forever=die!! How can I die? I'm not a good person that God wanna take so fast!! So what to do.. Sunk cost again.. Live life to the max!! Haha..

Dreamt of him for few days.. Missing him so much gua.. HEHE