Real nigga, I rep those, why though? Cause I said so

from Childish Gambino (Ft. Problem) – IV. sweatpants Lyrics on Rap Genius

Meaning

Whether you like it not—and whether Gambino’s history may strictly show it or not—he still represents one of the most honest characters in hip hop. He also does collaborations with some of the game’s upcoming and favorites including Chance the Rapper, Schoolboy Q, Ab-Soul, Kendrick Lamar, and others. This line could also be a reference to the flow on the “rap battle” with SupaHotFire

http://www.youtube.com/watch?v=MeB3eYk1Ze0

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