Frosty

It means cool. Its the best way to say cool.

Wow bro, that's so frosty!

Suss

Short for "suspicious". Used for casual and informal conversations.

Friend: "Yo dawg shake my hand".
You: That seems pretty suss man.

Rack

A word meaning $5,000.

You: You dawg, I just made a rack today by playing a Minecraft tournament.

Friend: "Wow dude, nice job."