One who does things randomly and spontaneously. Sometimes it does not make sense what they do because it's so random that even trying to make sense of it will make you go cross eyed.
I'm a randomaniac for inserting this randomentry into the urban dictionary database.
something so random that you randomly say that it is randomly random because there are simply no other words to describe such a feeling. over random, use of too much random things at once. crazy, insane, too random. use of alitteration.
random person: i want to be a twig in a tree
normal person: well thats randomly random