Usain Bolt is a Jamaican sprinter who is widely regarded as the fastest person ever. He is the first man to hold both the 100 metres and 200 metres world records since fully automatic time measurements became mandatory in 1977. He is also the first man to win three consecutive Olympic gold medals in the 100 metres. His nickname is 'Lightning Bolt' due to his incredible speed, which is why the term 'Bolt of Lightning Speed' is often used to describe him.