Definitions by MonalisaelisaDelafusa

That's What's Up 

A way of agreeing to what the other is saying. Or if they ask you a question it can also mean that you are down to do what they're asking.

1:"Ay mayne, i got this killa, we blazinituptoday?"
2:"Shiiiit, that's what's up!"

That's What's Up by MonalisaelisaDelafusa April 8, 2009