narccisus effect Share definition Flag When a person (generaly a guy) becomes obbsesed with himself and basicly incredibly vain. *guy looking into a mirror for ages* geash - that guys got the narccisus effect. narccisus effect by the postmans biatch June 30, 2004 0 0 Get merch Get the narccisus effect mug. Buy Now — $32.95 See more merch