When you don't care about something, so much so that you can't be bothered to lower your interest in the activity, as that would take more effort than you are willing to put forth.

Often mistaken for "couldn't care less." Technically could mean "I care a great amount."

used by confused individuals with a poor grasp of written english.

A misuse of a phrase similar to the misuse of the word irregardless. A phrase used by uneducated people intending to communicate the meaning that they do not care at all. Educated people notice and those who use this word instantly identify themselves to educated people as being uneducated. Educated people rarely correct them because it helps educated people more easily identify them if they are well groomed.

(1) - n. - A mental and emotional state in which disinterest, concern, and apathy could actually increase, suggesting a sense of neutral satisfaction;

(2) - adj. - slang - Could get worse so as it is not so bad now;

(3) n and adj., used often by Americans who are sympathetic to the pro-nonsensical movement, modern-American Illiteratencia, and the Nouveau White Trash Riche.

Etymology (origin):

The expression "I could not care less" originally meant 'it would be impossible for me to care less than I do because I do not care at all.'

Originally a British saying that came to the U.S. in the 1950s when the Republican Party was growing in popularity and strength across the nation.

By the 1980s, the GOP had achieved support from wide cross-sections of the American electorate, as it's policies of Educational eradication and cultural containment were attributable to economic growth, particularly strip-mall expansion and military weaponry for phantom enemies.

Language pro-incompetency became a primary political concern for the GOP, so long as it was butchered by "legal Americans," and with no strong ties to Mexican immigrants.

It became a simple, but memorable, issue for the GOP, surpassed only by the party's timeless rally call for more "Guns" and "God" and "less Gays."

While the now-common I could care less is senseless because If you could care less, that means you care at least a little.

The original is quite sarcastic and the other form is clearly nonsense.

to imply that it is possible to care less about something but you have not yet reached that deep level of "not giving a fucking crap" due to being forced to divert brain power to other things.