A word used with the meme: Dat Boi

What is up?

Its a greeting word. When you give you're friends that and say "Waddup"

The act of saying hello to one of your boys, in a douchey and frat boy type of way. Credit given to internet sensation Dom Mazzetti.

“Waddup bro” is what you say to a cool kid and they usually respond with a head nod or “waddup” back.

This means the same as "What's up" or "How are you"

Another way of saying, "Hey, what up?"