The song itself takes musical elements from Michael Jackson, James Brown and Ahmad Lewis. Lyrically this single is not as intricate as other tracks on TPaB. But that was on purpose. Kendrick wanted the lyrics to be simplistic but still have a message within it. He is able to be boastful but still have integrity. The title was important to K Dot because like many minorities (mainly black men), he has dealt with and heard negative slurs used against him and his loved ones. He wanted to take something negative and turn it into a positive. Even though society might make you feel a certain way, Kendrick wanted to emphasize that you are a man (a king). The track shows the heart of what Kendrick is all about.
Peep our own Twon Johnson's review of To Pimp a Butterfly.