DJ Whoo Kid -- Justin Bieber's On a Mission ... to Be an N-Word

Justin Bieber will still be spiraling out of control, despite his arrest, because he's trying like hell "to be a n-word" -- at least according to DJ Whoo Kid.

Kid -- who once got a fake Bieber tatt on his forehead -- was freezing his ass off in NYC, but couldn't resist shouting out Justin for his DUI ... or offering an explanation for Bieb's behavior.

Whoo says "I think Justin Bieber is transforming into the n-word. This year he's strictly n-word dot com."

He even has a string of evidence ... involving Lil Wayne, LIl Scrappy, white girls, and fallopian tubes. You gotta hear Kid state his case, while calling out Justin's b-ball skills.