"Whatever it was raced across the sky in its monstrous yellowness, tore the sky apart with mind-buggering noise ...". D. Adams, The Hitchhiker's Guide to the Galaxy, ch.3
Opposite of a brain fart. A mind nugget is a thought or idea which pops into your head like a light bulb moment.
Had the biggest Mind Nugget when I was gacked on Molly at Burning Man....I thought about how much better my parents would understand their shit if they’d been as high as this.