Where did this come from? Quite clearly the phrase should be 'I couldn't care less'. 'I couldn't care less' means like; "oh, what you said is so disinteresting that there is not a single thing that i could care less about" Wheras 'could care less' means like; "oh, i could care less about what you just said, therefore it could be anywhere on my list of things i care about other than the bottom" it really grates on me for some reason. Why and when did people drop the n't. to give this thread slightly more discussion value, please add your own sayings that have changed and no longer make sense, but first and foremost, help me get my head around 'could care less'.