Copied from wikipedia:Bands linked with nu metal derive influence from a variety of diverse styles, including electronica/electronic music, funk, glam rock, gothic rock, grunge, hardcore punk, hip hop, industrial rock, jazz, post punk and synthpop. Also, nu metal derives influence from multiple subgenres of heavy metal including rap metal, funk metal and thrash metal. Nu metal music is mostly syncopated and based on riffs. Its lack of guitar solos and virtuousity contrasts it with other metal subgenres. Another way in which nu metal is contrasted with other metal subgenres is its emphasis on rhythm. Similarities with other metal subgenres include its use of common time, distorted guitars, power chords and note structures primarily revolving around Dorian, Aeolian or Phrygian modes. Some nu metal bands use 7-string guitars over traditional 6-string guitars. 7-string guitars, which are sometimes downtuned to increase heaviness, resulted in bass guitarists using five-string and six-string instruments. Some nu metal bands feature a DJ for additional rhythmic instrumentation. The vocals of many bands may range from melodic singing to rapping to screaming to death growling or in some cases have all of these styles in a single song but it can range from song to song. The lyrics of many nu metal bands focus on pain and personal alienation rather than the themes of other metal subgenres. I thought Id put a definition in that doesnt use childish behaviour to put foward biased arguments
All the are nu metal: Korn, Slipknot, Static-x, Disturbed, Mudvayne, System of A Down...etc.