You could buy what's in my closet
If you had stacks instead of wallets

from Big Sean (Ft. Sayitaintone) – My Closet Lyrics on Rap Genius

Meaning

Once you hit a certain amount of money, you can’t fold it all in half anymore. You have to start stacking it into an organized pile and rubberband it all together. The shit in Sean’s closet is so expensive you can only buy it with a stack, not with the amount of money you can fit in a wallet.

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