When you seriously don't care about something, I don't think it's mean to say you don't, but I've noticed something. If people keep saying they don't care about this or that or who, why do they keep bringing it up? I rarely even talk about things I don't give a damn about... but maybe that's just me? ;}
I'm probably guilty of that from time to time too. ;}
All the time.
When you are using that statement to overlook supposed flaws in people.
When someone asks, "Do you mind if I borrow your credit card?"