It's a hard question to answer. Each region has its own way of speaking and there aren't slang words (that come to mind) that is shared by all of them. -By the way, "slang" is only singular; it doesn't get pluralized into "slangs".

That s a good question,Dude! hehe and I think the Aiyah said by marctaro is 哎呀，actrually it is an interjection means Oh my,and I believe the slang varies with times.

The most commonly used slang on the west coast of the USA is "Dude". "Dude" is a phrase used for almost anything, depending on how it is pronounced. Just like "Aiyah" is used by the Chinese in Hong Kong.