今日美语俚语 - What's up?

Idiom: "what’s up?"

Definition:

what's going on? what's new?

Examples:

1) Hey, what’s up Carl?  I haven’t seen you in awhile.

2) Hey, you just hit my car!  What’s up with that!

中文解释：http://www.youzienglish.com/main/idiom_of_the_day/whats_up/cn/