Here is what exactly was said to Zidane by Italian racist Marco Materazzi

The deaf forensic lip-reader Jessica Rees was employed to analyze the video sequences with the help of an Italian translator. According to these reports, Materazzi spoke in Italian - a language understood by Zidane due to his time spent with Juventus F.C. - and first told him: "Hold on, wait, that one's not for a nigger like you." As the players walked forward, Materazzi allegedly said: "We all know you are the son of a terrorist whore." Then, just before the headbutt, he was seen saying: "So just fuck off." [8] [9] According to Brazilian TV Rede Globo, a lip-reader claimed that Materazzi called Zidane's sister a prostitute two times.[10]
In response to news reports that he had called Zidane a "dirty terrorist"[4], Materazzi stated: "It is absolutely not true, I did not call him a terrorist. I'm ignorant. I don't even know what the word means."[5]
No wonder Zidane flipped out ...