Someone who updates their facebook status every 5 minutes whether or not they have something important to say. An omnipostant person is known to post song lyrics, irrelevant activities, how drunk they are and how much fun it is where they are and who they are with. first coined by the staff at davincifox.com
Guy1: Dude, i don't understand why you would set your status update to "I am not in a good mood and i don't want to talk to anyone", i mean seriously you just talked to 200 people!...Seriously This kid Gary is out of control with this shit
Guy2: Yeah Gary is all about that, he's a real omnipostant son of a bitch