Don't be mad cause I'm doing me better than you doing you (x3)
Better than you doing you, fuck it, what you gon' do?

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

Meaning

Problem and Gambino are both doing their music and using their talent to its full potential, making shitloads of money and slamming hoes, basically telling us not to be mad because he does him (his music), better than we do we (our regular, boring lives). “Don’t be mad because my life has skyrocketed and yours goes nowhere.”

He continues the bragging, with an “I don’t give a fuck” attitude. What the fuck could we possibly do to stop him?

Childish Gambino @ Coachella Music Festival

This could be a reference to A$AP Rocky: [Gambino] claims a compliment from Rocky also turned out to be a jab from him.

It was funny, yesterday he kinda sneak dissed me but also gave me props but gave himself props at the same time. He was like, ‘I know you want to be me, but it’s funny, ’cause I wanna be you.’

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