could/couldn't care less

You people sure are lucky to have me. Here's another one that's grossly misused.

How often have you heard someone say, "So my team lost. I could care less." Really? You could? What you're actually saying then is that it is, indeed, possible for you to care less.

If your intended meaning is that it is not humanly possible for you to be concerned about the gravity of a situation, then you couldn't (as in, it's not possible for me to) care less.

There you go. Another one of life's problems solved. You know, if all of you would just speak the proper way from the "git-go," I wouldn't have to do this. . .even if you couldn't care less.

But since I was chosen for this mission, I'll continue on.