un-fergalicious Share definition Flag A person who is very promiscuous and displays qualities that are unlike Fergie, becuase fergalicious ain't permiscuous. I saw that girl with five guys last week. She is so un-fergalicious. un-fergalicious by Tucker D April 8, 2007 0 0 Get merch Get the un-fergalicious mug. Buy Now — $32.95 See more merch