OIMBUYA stands for "Or It's My Boot Up Your Ass," a quote from the movie "The League of Extraordinary Gentlemen." It is thought to be a space-time anomaly within the fabric of the four corners of the YTMND universes. Little else is known about Oimbuya except that it is rumored to be a greeting for hello in the Kenyan language of Ekegusii. Whether Ekegusii-speaking Kenyans greet each other by claiming to position a boot in each other's asses is as disputed as the existence of the space-time anomaly itself. Research continues.
Link to pseudofad: http://oimbuya.ytmnd.com