What are Geeky Onesies?
Onesies itself is a an outfit that as the word explains is an all-in-one.
Originally used as underwear back in the wild west and later in the two world wars by pilots as their jumpsuits.
It only became a fashion craze when once it became pajamas back in the 1990s and they starting designing it to look and represent real animals (the kangaroo being the most famous as it had the original pocket in front like a real kangaroo and late only bettered by the Panda Bear because, well they are the cutest!)
The Geek designs only came out later when fraternity parties started showing interest in it as their fashion wear at pajama parties and branched out into normal parties as well.
The geek one would be one representing anything with a nerdy or geeky theme, from having actual pocket protectors to have all different math and science equations all over it.