Bob, who is Chinese, is speaking to his American classmate, Jill.
J: Hi, Bob. What's up?
B: I don't see anything up in the sky. Do you?
J: No, Bob. "What's up?" is slang for "What's happening?"
B: Well, why didn't you just ask me that in the first place?
J: Get with it, Bob. Everyone uses slang in America. It makes speech more colorful.
B: I'm having enough trouble learning English.
J: But you should give it your best shot, Bob.
B: Why?
J: How else can you get to meet American chicks?
B: What chick? I don't like eggs.
J: "Chicks" mean "girls," you fool.
B: Oh, I give up!

get with it -- follow the trend 跟着潮流走
两种说法：I am American. or I am an American.   Chinese 一样
What's up, man? 年轻人常用   answer: Nothing special. How about you?      dude = guy = man  哥们,年轻人用
How is it going?  还不错吧？
be short of 缺乏   be short for 缩写
in the beginning = in the first place  开始
You speak in informal English.
formal occasion : funeral, wedding
speech 讲话(不可数)   演讲(可数): Peter made a speech to the students who fell asleep. 
deliver a speech  发表演讲
speechless    I was speechless when she said I love you. 无话可说
best shot = best try
how else 要不然
you fool 傻子