so what happens when playerslea field, including teeth marks?ash inside the penalty area. >> reporter: usually the no biting conversation is limited to animals and small children. not stars of the world cup with millions watching. >> it looks to me, dare i say, he's had a little bite. >> reporter: yes, that's uruguay star luis suarez, apparently biting an italian defender. his nickname was already the cannibal. because this is his third, yes, third biting incident. first in 2010 in the dutch league. then again as seen last year against chelsea, his carnivorous appeti appetite. fans here, though, defend him. you think it was okay that he bit anymore >> yes, for sure. >> reporter: american fans, on the other hand. twitter went into a teething frenzy. evander holyfield, tweeted i guess any part of the body is up for eating. although the cameras caught him, the referees did not. no card was given. even with the defender desperately showing the scene of the crime. meanwhile, as the world jokes, and even paints their toothy image, uruguay moves on to