It was a big misunderstanding.
Materazzi was complaining about his pants and called them silly. Zidane misunderstood and thought Materazzi called him "sissy pants". Fighting words if ever I heard any. ;)
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http://news.yahoo.com/s/nm/20060711/sp_nm/soccer_world_fifa_dc_2>
>My guess is that he said:
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>"I would not want to use your stinking shirt to wipe up my a$$" :)
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>Any other guesses? :)