Top Definition
Also known as MUNHS, this is defined as the temporary delusion suffered by delegates in a Model United Nations conference where the delegate forgets the fictional nature of the conference and instead, believes the events of the conference are real and are actually taking place.

This is most experienced in Crisis/Experimental Committees.
Sid/ Minister of Justice: Those Prussians just invaded Alsace-Lorraine! What the fuck, I thought we had troops there! Arrest the military commanders in the region for incompetence!

Chair: Chill, this is not real. You're suffering from Model UN Hallicunation Syndrome.
by srav August 31, 2016

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