Definitions by MS3MY

U.O.E.N.O 

stands for "You ain't even know it." If you say the letters aloud it will help you say "You ain't even know it" with an urban accent. This term is used when you are doing something so epic, people don't even realize it's right in front of their face.

These shoes cost half a million dollars, U.O.E.N.O.

U.O.E.N.O by MS3MY August 12, 2013