It's the Diddy and Biggie driving backwards, I'm so iconic

from Childish Gambino – Think of Me Lyrics on Rap Genius

Meaning

A reference to the video for Biggie’s “Hypnotize”:
https://www.youtube.com/watch?v=glEiPXAYE-U

He’s saying that he is iconic just as Biggie and Diddy driving backwards in the video is iconic.

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