Originally Posted by odiesback
...The Oxford dictionary already recognizes “could care less” as an American colloquialism
. Many people, however, regard it as incorrect since it makes no logical sense (if you “could care less” it means that you care at least a bit)."
I stand by my statement... maybe I care a little
My "American" understanding of this term is that it is said with a tone more or less dripping in irony. Therefore "I could care less" means I really couldn't.