Hollaback = Hole in the back. Back with a vengence
Hole is literary an open
wound -that she has been backstabbed
by those gossip
queens in her pack, leaving a hole in her back. And to get back at those bad mouths, she 'tekan' them by making them do the routine again and again as in lyrics: "going round the track again"
Basically, a backstabbed
victim coming back with a vengence