I'm not looking up standard meaning but here are some examples:
"What's up?"- used to ask someone what they are doing or what they're feeling if they seem down.
"Bro"- used to refer to a friend. Shortened form of "brother"
"Dude"- again, used to refer to a friend. Typically gender neutral and does not always refer to a male
"Hang"- (ex. "Wanna hang?") used to ask someone to spend time with you