There are many words and expressions used as a slang, and they differ from region to region.
I can give several examples of American slang that have caught recently.
To be a woke means to be aware what is going on in public, political life about all the hype events.
Lit is adjective which is used to say extraordinary cool and fun. If a person is lit it means he's drunk.
The last night party was so lit!
Hope, it'll be helpful for you.