I’m riding dirty, tryna get filthy

from Kanye West (Ft. Flux Pavilion & Jay Z) – Who Gon Stop Me Lyrics on Rap Genius

Meaning

Jay alludes to Chamillionaire’s Ridin Dirty which itself alluded to the 1996 UGK song.

To “ride dirty” is to have illegal drugs and/or weapons in your car. Jay does this in hopes of getting filthy [rich] (note the dirty / filthy wordplay)

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