Obviously* it's not printing money literally. But it's increasing the money supply. When governments deficit spend, they deposit money in private sector banks, increasing their balance sheet. The net result of this is more dollars in and flowing through the economy.

Which is... printing money, pretty much. The idea that it's some kind of moral failing or inherently irresponsible is silly, but the description isn't some crazy conspiracy theory.

* I'm sure some people have the idea that Jerome Powell is walking up to a printing press, turning a crank, and literally printing money. But I'm also pretty sure that no one here is under that misconception.