A sense of extreme euphoria brought about by experiencing great amounts of both nostalgia and sheer awesome in a short amount of time. Usually less than five seconds. The effect is likened to being a reverse-migraine.
I hadn't played Super Mario Bros in years, so when I beat Bowser yesterday there was almost an immediate phantasium that followed.
by Rick Nomere October 01, 2007

5 Words Related to phantasium

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