Muscle Milk?

I was browsing tonight and I came across this website and it talks about muscle milk review. I got curious as to what is this muscle milk. I was thinking maybe it's just a term that is being used for something else. Apparently, it is a protein supplement with no calorie and little fat.

Well, I guess right. It's a terminology or should I say a name for something to do with muscle.

Now come to think of it, I think I might have seen one before. My husband used to have some protein supplement but its a different brand. I really need to get more information about this stuff, it might be beneficial for my nutrition class.