Old guys at my work

So I have an office in the corporate area, and there are these old guys that walk around and I can hear them having random convo’s as they walk by that are usually like this:

Guy1: What up dog?
Guy2: Not much, chillin…
Guy1: What it do?
Guy2: Notta, keepin it real

With multiple variations of this.

I get a :wierd look on my face everytime they walk by. These dudes are like 50+ And they are SRS when they say it. :rofl

they ne99gro’s?

i never understood the “what it do” line. what does what do now? eh?