Cumulonimboi is the meme name for a cloud; particularly one of the cumulonimbus variety. The name is often associated with deep fried images of various clouds used as parts of other memes.

Cumulonimboi was born in the dark mind of Jackson during the 2017 Formula Sun Grand Prix and originally posted to several private slack channels. As one might imagine, clouds and solar powered race cars don't get along very well, so the meme caught on quickly. The original usage was as part of a Who Would Win? meme: "Who would win? 1 Kilowatt per Square Meter or 1 lonely Cumulonimboi". The joke (for those not part of the community) is based on how easily a singular cloud can shut down a whole fleet of cutting edge, hyper advanced rayce cars worth millions of dollars.

After one particularly rainy day, the meme exploded and gained traction throughout the small but dedicated memedom of the international solar racing community. From there, it entered the redditsphere, featuring prominently on r/solarracing. To those on the inside, it seemed that the meme had reached its peak, but then a new opportunity came along that made the idea relevant to the entire North American Meme Family. The 2017 Solar Eclipse.

What can reck your viewing of a once-in-a-lifetime event more easily than a wandering Cumulonimboi? Nothing. Just a few days before the event, the memes began flying. The humble Cumulonimboi quickly gained additional fame under other titles such as "Fluffy Boi" and "Poofy Boi"