"Trickle Down Theory" is a meme used (mostly by non-economists) to ridicule certain economic policies and the theories on which those policies are supposedly based. My first year students sometimes ask me to explain it to them, not understanding that it's a meme and not a theory.
"Magic Dirt Theory" is a similar meme, of more recent (and "deplorable") origin (a quick search tells me it's from Vox Day/Supreme Dark Lord). But ideas, including memes, should be evaluated on their merits. Here is a critique of that meme, from a nationalist/conservative perspective.
You have probably heard of "Trickle Down Theory". But only 16% of the (probably unrepresentative) 127 people who answered my Twitter poll (thanks!) had heard of "Magic Dirt Theory". And the percentage was smaller for economists than for non-economists. This is a smaller percentage than I thought it would be, but not trivially small. I don't know whether in the long run it is memes that are powerful for good or evil.