Sb / Sth is the shit.
Sb / Sth is awesome/ the coolest.
超棒超酷的，超牛X的！
Hey! You have to try this Spaghetti! It is the shit!
诶！你必须得试试这个意大利面！巨好吃的！
Oh my god! Thank you so much! You are the shit!
天哪，太谢谢你了，你太棒了！

注意the一定不能落掉，否则意思完全相反了：
This Spaghetti is shit!
这意大利面跟狗屎一样！

Sb / Sth is so sick. = Sb / Sth is so cool.
Somebody is even talented at something!
某人很棒很赞！或某人很有天赋！
Oh my god! Tana is soooooo sick! You should introduce me to her!
天哪，Tana这个女孩纸也太棒了吧！你要把我介绍给她啊！
She is so sick! Have you seen her paintings?
她超有天赋的！你看过她的画吗？
This spaghetti is so sick!
这意大利面很赞！

Sb is such a badass!
someone who is tough and ethical and compared to other people… other people seem normal compared to them!
一个非常厉害，不在意世俗的眼光，打破正常常规的标准的人
She is such a badass, she stood up to her boss when no one had the guts to !
她超diao的，所有人都没胆对抗老板的时候，她站了出来！

bitch
很“厉害”的女人，经历了很多困难时候，但是熬过来并且很成功的女人
Ariana Grande must have been a real bitch! Look where she is now!
Ariana Grande真的厉害！看看她如今的成就！