Ah Robo, join the club. It's something the younger set is doing. I don't know anything about where it originated, but my DD and all her friends have an app that generates Keep Calm sayings. They are all Keep Calm and ... Insert something here. I don't quite get it but again, I'm the Mom, I'm not supposed to get it. I do see the cuteness of the shirt based on the existence of the Keep Calm phenomenon.