The story
In reference to the "Money Printer Go Brrr" meme, created on March 9, 2020, in which a Boomer Wojak representing the United States Federal Reserve uses a literal money printer (which is making the sound brrr like a traditional printer) to create large amounts of money to counter the economic effects of the Covid-19 pandemic, despite the possibility of increasing inflation. Likely ultimately derived from the line "Money counter go brrr" in the song "No New Friends" by DJ Khaled, Rick Ross, Drake, and Lil Wayne.
Etymology from Wiktionary, CC BY-SA 4.0.