bene gesserit witch Share definition Flag A female that appears to be beating or pwning a male at his own game with no effort and much ease. That bene gesserit witch must be using a wall hack because no girl is that good. bene gesserit witch by mieshka September 24, 2005 0 0 Get merch Get the bene gesserit witch mug. Buy Now — $32.95 See more merch