Afrikaans slang which loosely translates to the derogatory insult "fuck all you fuckers," or "fuck you all." Made popular by South African rap-rave group DIE ANTWOORD, but not invented by.
Put the pedal to the metal and I'm scorching my tires. Middle finger in the air, ja! Fok julle naaiers!
Substitution for Holler or Holla (made popular in the early 2000s with such hits as Holla by Jay-Z, Holla by Ghostface Killa, Holla @ Cha' Boy by Ice Cube, and various lyrics by Missy Misdemeanor Elliott)