nutmeg phantasy means: A vivid and complex daydream, often uncontrollable. It can also be extremely pleasurable or frightening. This is due to the consumption of large amounts of nuts in order for psychoactive effects. This can be caused by meditation, contemplation, drifting into a near-sleep or trance state, daydreaming or spacing out, and listening to dreamy or ambient music. Nutmeg can be dangerous. Begin with very low amounts. (in Community Dictionary, added by Jonathan King)