Negative Nacy Share definition Flag The act of a girl sucking your big man so sloppy that the slobber goes all over her face and in her eye. Dog that was so nasty. last night lala gave me a negative nacy! Negative Nacy by Justwwinbaby January 9, 2011 0 0 Get merch Get the Negative Nacy mug. Buy Now — $32.95 See more merch