couldn't care less 

The proper way to express how you don't give a crap about something - you really don't care about something and it's impossible to not care any more. The common but incorrect variant "could care less" (which would technically imply that you do care about something) is widely used because of either a translation mistake into English, or those who blindly use phrases without taking a moment to understand their actual meaning.

Person A: A company just got sued for patent infringement!
Person B: *yawn* Oh really? I couldn't care less.

couldn't care less by generic June 11, 2006

I couldnt care less 

Means that someone is unable to care any less for your current situation.

Person 1: I hurt my leg
Person 2: I couldnt care less, go away!

I couldnt care less by Gazado October 10, 2005

I could care less 

Wrong slang. It's supposed to be "I couldn't care less" - because I have no interest. "I could care less" means there is some interest.

"Leaving? I couldn't care less."

I could care less by ninedots December 3, 2004

i could care less 

an expression that idiots use when they don't care about something or have no interest in something. what they really mean is "i couldn't care less"

john: this video game is so good. i could play it forever
jim: i could care less. i hate video games.
john: wait, so you could care less.... that means that you care somewhat. you mean "i couldn't care less"?
jim: what? no. i don't give a shit about your dumb video game.
john: you're a fucking retard.

i could care less by zach the sach July 31, 2008

could care less 

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

person1:"i could care less"
person2:"my brain isn't melting"

could care less by skunky December 26, 2004

could care less 

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

Person: I could care less.
Me: Don't you mean "I couldn't care less"?
Person: Yeah well fuck you.

could care less by k512.com September 10, 2003

I couldn't care less 

The classier (and cleaner) way to say "I don't give a fuck", "I don't give a shit", "I don't give a crap", "I don't give a damn", etc.

(Do NOT confuse it with I could care less. If you *could* care less, it means that you can reduce the amount of fucks you give!)

"The Dvorak Keyboard lets you type comfortably because the keys are positioned so that the fingers can-"
"I couldn't care less."

I couldn't care less by cutesy pastel living doll November 6, 2013