Cannabilism (Enchantment)

This enchantment allows the player to gain food when attacking, but only from another player, or a Zombie.

Overview
This enchantment can only be found in Enchanted Books. When you hit a player or Zombie with the sword/axe that has this enchantment, some food will drop from the player or Zombie. A zombie drops Rotten Flesh while a player drops Clean Flesh. The higher the level of the enchantment, the more flesh you get.

Trivia

 * I tried to make this an enchantment in vanilla Minecraft using Command Blocks, it failed.
 * This enchantment is very rare due to it only being found in an Enchanted Book, which are found in dungeons.  Dungeons seem to rarely have Enchanted Books from my point of view.