I don't eat pasta, everything is low-carb

from Childish Gambino (Ft. Nipsey Hu$$le) – Black Faces Lyrics on Rap Genius

This relates back to how he was chubby when he was younger. He moved to NY and started working out to lose weight (see his song Grind). Now he doesn’t eat high carb food so he doesn’t go back to that life style of being fat and nervous.

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