What does it mean when a guy is said to be afro hung?

First of all it usually means we are talking about - surprise! - a black guy.
Secondly he has a big cock, i.e. he is packing at least 9 inches of erect black meat.

To be feautered here on AfroHung.com it also means that he
Thirdly is proud to show off his dick and has uploaded a picture or video to the internet.

> > > Come inside and grab a black dick < < <
WARNING! ADULT CONTENT!

No thanks, I prefer the wimpy ones

AfroHung.com features both thugs from the hood and horny black amateurs from the other side of the globe.
All that matters is that he is a proud black male having a well-endowed penis, above the majority of men.
Some are just a little larger than white men and others are so hung they have to tuck the dick under when wearing shorts.