It's such a civilized game. The biter in question is Uruguay's Luis Suarez.
The incident, shown on television replays, showed Suarez apparently bite the shoulder of Italy defender Giorgio Chiellini as the pair clashed in the Italian penalty area. It happened about a minute before Uruguay scored in the 81st.
And thank God Twitter now hosts GIFs (or GIF-like things, at least).
The bite heard round the pitch. http://t.co/yrHRNXbu4n http://t.co/Tv5YaqLrqZ
— Jim Roberts (@nycjim) June 24, 2014