Tumblr is a multimedia blogging platform that has graced the internet since 2007. It originated as a simple place to express thoughts, post photos, and share the classic '07 memes. However, by 2012, Tumblr became an immensely popular platform for people in "fandom." Similar to DeviantArt, it became a place to share content regarding whatever media was popular! And of course, as the internet does, Tumblr introduced many memes into our lives.
With comics, movies, shows, and even books, there are too many origin stories to even think about counting. This isn't a complete list, or even a partially complete list.
Origami... the Japanese art of paper folding. The word itself might sound kind of scary to a new-comer, but in reality, origami is beautiful, simple, and so easy to start!