Mr. Viet, I would be grateful if you could reply as soon as possible about your time spent in a biker gang.
A tribe that runs wild (暴走) is what the Japanese call a biker gang. Just imagine them riding around on their bikes, running wild. They're also close, like a family. How nice!
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.