Smaug was the name of the dragon that played such a big part in The Hobbit. Bilbo had to enter his lair to steal the treasure that he guarded there. Smaug was the last of the great Fire-drakes and he was killed by Bard of Dale as he was sacking the Dwarf-kingdom of Erebor. Bard used his magical black arrow to hit Smaug in the only part of his body that was not protected.
"Shall we continue to our next creature: Balrogs?"