Uh, I fuck around with amnesia, pour 4 inside of my liter
One day I'm a get it all cleaned up, right now I'm a dirty my jeans up
Amnesia is a deficit in memory caused by brain damage, disease, or psychological trauma. Mac Miller had a lean addiction at the time this lyric was written. He is saying that by sipping all of this lean he is close to getting amnesia, but he is parting so he doesn’t give a fuck. But he promises himself that he will eventually quit. Which he actually did.
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