Stacking all of this paper, dawg
I like to call this shit old news

from Wiz Khalifa (Ft. The Weeknd) – Remember You Lyrics on Rap Genius

Meaning

Wiz stacks money earned so long ago that it is similar to the way some people end up piling up out-of-date newspapers when done reading them. 

Some would say he also puns that he’s been stacking paper for some time and that it’s “old news.”

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