Drugged meat is an item from the Unstable Foundations tutorial quest. It is used to make the Dragon fall asleep. It is given to the player by Sir Vant, who is a White knight fighting the dragon throughout the beginning of the tutorial. It can be found in Sir Vant's bag during the tutorial, along with other supplies that can be used only during the quest.
It is laced with a sleeping potion, and although it has an eat option, the meat cannot be consumed by the player.
The only action that can be performed with this item is to place it in one of the three Dragon's food bowls. Attempts to eat this as food will result in Sir Vant exclaiming "Are you mad? Don't eat that! It smells vile, it's completely raw, and I'm sure I mentioned that it's been treated with sleeping potion!"
There is currently a bug where, if you created an account during the time of that tutorial, obtained the item, logged out, and did not log in again until the latest tutorial update, you will still have the drugged meat in your inventory, but it will have absolutely no use.