For my homies that still sell pills and load Glocks
I told them young dudes clean your money up
There's a recession and it's the perfect time for comin up!

from Murs (Ft. Ab-Soul & O.C.) – Life & Time Lyrics on Rap Genius

Meaning

Murs is giving advice to young men who are still making money selling drugs and doing other illegal things. A recession is a bad time for a country but also a good time to clean your act up.

Note that money from illegal activities is considered “dirty money,” so he wants them to switch to “clean” money.

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