A part of Russia to the East from the Ural Mountains. Siberia geographicaly is devided into two parts: Western and Eastern. Western Siberia is extremely rich in oil and natural gas. Eastern - in metals and diamonds. Climate is cold, drops down to - 50 C in winter. Summer is hot - up to 35 C. For the US residents: temperature is not in Farenheit. Russian people who live there are called sibiryaki. In Russia they are well known for big height and physical strength.
That guy is form Siberia. If I were you I wouldn't mess with him.