Orange County Weekly does its best:

So that’s right dude, meet me at the bleachers
No principals, no student-teachers
Both of us want to be the winner, but there can only be one
So I’m gonna fight, gonna give it my all

We learn that it was a “dude” who gossiped about Gwen. She challenges him to a fight at the bleachers. If he imagines it will be a fair, one-on-one fight, he is sadly mistaken. Gwen and her aforementioned “pack” will pounce on him like rabid wolves.

However, I’m pretty sure the explanation can only be found by watching the video, along with other recent Gwen Stefani videos: She’s insane…but, at the very least, she is no Hollaback Girl. 😉

Link courtesy of Adam M