Top Definition
Person who is more confortable in the world he has created in his mind THAN IN THE REAL world. Sometimes, it can be that at one moment he/she disconects for a few minuts and gets to this imaginary world.
A student is in a class and suddenly he remains in motionless, and he starts making grins. That would be a slight case of ONM syndrome
by Thehollycow224 December 06, 2013
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