What does this symbol mean

My understanding is that when you are fighting an enemy, particular human ones, there's a chance that one of your fast/strong attacks will activate a killing animation, which instantly kills the enemy, even if they are at high health, which makes it particularly useful.

So dismembering is essentially an insta-kill, but I think I mostly see it occur on humans, not as much on monsters, if at all.

I did a few experiments, and the answer depends on which kind of food it is. I found three different categories, though there might be more:

• food (raw meat, grilled chicken sandwich, ...)
• non-alcoholic drinks (milk, ...)
• alcoholic drinks (rivian kriek)

Each category has a different rate of health restoration, food has the highest at around 100/s, non-alcoholic drinks have a much lower value at around 30/s and alcoholic drinks have the lowest at around 20/s. Alcoholic drinks also have shorter restoration periods than the value listed in the inventory, that value is for how long the intoxication and screen blurring lasts, the 25s beers seem to have 15s of actual HP restoration time.

Ond food and one drink item stack, but not more. Non-alcoholic and alcoholic drinks don't stack, you can have only one active at any time.