Usain Bolt is a Jamaican sprinter who is widely considered to be the greatest sprinter of all time. He is the first person to hold both the 100 metres and 200 metres world records simultaneously, and he is the only sprinter to win Olympic gold medals in both events at three consecutive Olympic Games. Bolt is also the world record holder in the 4x100 metres relay. He is known for his lightning speed and has been nicknamed 'Lightning Bolt'.