Spoken like true white guys.
And, more importantly, you are willing to believe anything written in Wikipedia. LOL
Obviously you guys didn't grow up in LA or NY - or ever cruised downtown on a weekend.
Guys cruising the strip shout out to the cute / pretty girls as they drive by.
Or, if you are sitting on the stoop and 2 or 3 fine ladys walk by, you and your buddies try to start something.
If the girls shout back (holler back) - they are "holler back girls" - friendly, fun, not stuck up and potentially someone they can hook up with.
If they don't "holler back", well, you just move on to the next group of girls.
Gwen Stefani took the term and made a song out of it. I assume that when she was younger, she was a Holla Back Girl.
And, to "punch it up" and target the younger crowd, she shortened the words to fit her song. ("holla" back, or "hella" fine - you get it).
Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!