UOU Stands For: Rank Abbreviation Meaning ***** UOU Union of Uranus Click to see full answer. Accordingly, what does U mean in slang? The Meaning of U U means “You” So now you know – U means “You” – don’t thank us.Furthermore, what does Owo mean? OWO is oral without consent. Besides, what does Udj mean in texting? UDJ. Union Deutscher Jazzmusiker e.What does U mean texting?(U) means “Heartbroken” So now you know – (U) means “Heartbroken” – don’t thank us. YW!