People who have failed at life, and tired of selling drugs. People who are cant sing or are not musically inclined. They also dont know how to rhyme, and think their "music" is poetry. Rappers are a horrible excuse for musicians, just as rap is a horrible excuse for music. Rap is created from the word crap as most musicians knew that rap would be crap. A rapper is the crapper of all musicians.

Literally everyone, ever. Including the writer of this definition.