Since hip-hop began, MCs have been out to one-up their rivals, so it's no surprise that the quest to be the world's fastest rapper is hard-fought. Quickest doesn't necessarily mean best – there are a ...

Since hip-hop began, MCs have been out to one-up their rivals, so it's no surprise that the quest to be the world's fastest rapper is hard-fought. Quickest doesn't necessarily mean best – there are a ...