"Cray"
This means crazy.

"Lit"
This means cool.

"Hundo P"
This means hundred percent.

I thought that it is better to recommend the book which is on the list of great novel in Google than I've read. So I looked up and I recommend "Tuesdays with Morrie". It says that when Mitch Albom reconnects with Morrie Schwartz, his former college professor, he learns valuable life lesson...

What does "tech bro" mean?
Is it positive or negative?
Could you give me some example sentences?