Flaites and fighting

After another day of school that lasted till 5, Chico and I left for home along with a few other guys. We made it a couple hundred yards when Xico warned me to make sure my cell phone or something was safe. I was wondering why when from behind us approach the kind of person called fleites here, 4 or 5 of them. One of them approaches Chico and says something like "WTF do you think you're doing, fag?" it looks like it could turn into a fight, though the other Conce guys with us are trying to break it up, saying "¡¡tranquilo!!" and it almost seems like nothing would happen when a different fleite, a small one that had been behind the one that was mainly in Chico's face, runs forward and punches Chico in the face. Since they were speaking quickly with plenty of slang and stuff, I must have missed something because the little fleite's attack was completely unanticipated. Chico is pushed backwards and at least the two fleites are punching him, and I realize it is time to do something. I am slow to come to that conclusion and to reach them, because now a white truck stops and the fleites vanish. Chico asks that I don't tell our parents or abuelita, because abuelita would worry too much. He has the slightest cut lip, but other than that seems unhurt. Chico doesn't know what got the fleites all reiled up and The next day I was informed by a classmate that something like that never has happened before. So that is the first actual fleite experience I had, before I had just been warned to avoid them and that they steal stuff a lot. They apparently have their way of dressing but I am not yet quite certain what defines that.