could care less/couldnt care less

Couldnt care less is the expression that individuals use when they dont care about something or lack the interest in the conversation or situation in question. The cliche is often worded incorrectly as could care less but in fact, if you could care less, than you care a great deal. The correct way to use this idiom is to say you couldnt care less, in that you care the least amount possible, usually not at all.