You are so cold, nothing can rile your (Jason Statham exemplifies this)

It’s a metaphor which suggests that people who are fairly quiet about their personal lives tend to have deeper and more (perhaps) meaningful existences– you just don’t see the emotions/thoughts/etc. as much as you do with a more demonstrative person. Which may or may not be true. Certainly a lot of drama queens have pretty shallow lives… but then again, there are plenty of quiet, unobtrusive people who aren’t exactly the next great philosopher. The metaphor comes from observation of streams. Shallow water tends to be noticeably choppy, since it’s flowing over rocks, branches, debris, etc. near to the surface. Very deep water tends to look absolutely calm, as there’s nothing close enough to the surface to break the surface tension.

Basically what everyone else has said, is a definition of your phrase. It can also mean, You’re a stone statue with ice running through your veins. So cold and frozen, emotionless and blank, You reek of death and oblivion.

That is just one explanation I have heard before. Have a good one.

The phrase “ice water running through your veins” means that you are one cool customer in pressure situations. You can handle any pressure without losing your cool and composure.

None of the above. I literally feel like ice water running under my skin down my body. Comes at no particular time.

This phrase usually means someone who is very cold-hearted to other people or animals. It’s like they have no blood to keep them warm.

compassionate ppl are described as being warm and cuddley

Ice in the veins, they cant feel anything, no warmth, no compassion. Plus (biology nerd here) if your frozen, or numbed you cant feel anything either.

It basically means that the person is cold and callous. Not the nicest person in the world 😉

It means that you remain cool, calm, and collected despite being under extreme stress

It means that you don’t care about other people’s emotions. You only care about one person, YOURSELF.