Ah yes, the "I could care less" mangled phrase.
That one is like fingernails on a chalkboard to me (btw, do they still have chalkboards in school today?)
Next time someone says that to you, ask them how much less they could care and then see if their head tilts sideways like a confused dog.
I'm going to start The Church of Approxapathesism for people that could care a little less if there's a god or not.