Meaning
What does Galaxy Brain mean?
Galaxy Brain, also called Expanding Brain is a multi-panel exploitable image series, which compares the size and activity of people.
While it signifies higher intelligence, it is used in an ironic manner and is associated with ridiculous ideas and beliefs, rather than a legitimate credence.
Even when I want to be a mere high brain, my GM forces me to be galaxy brain.
Origin
What's the origin of Galaxy Brain?
Spread & Usage
How did Galaxy Brain spread?
The template caught on and was paired with many other phenomena, including politics, music and video games.
It remained popular on Reddit, however the meme format became a major one, appearing on most social media sites, where people post memes.

External resources
- Dailydot – Why 2017 was the year of the Galaxy Brain