36+ I Could Care Less If We Stop Talking. I felt that could care less was more euphonious than couldn't care less and sounded a bit cheekier. stop making those embarrassing mistakes! Couldn't care less is the older and more obvious phrase grammatically, but it has been confused for so long that both are now defined.
Couldn't care less is proper because it's saying that i could not care any less about this;
I've heard it said that could care less is meant to be ironic, but i think this is just justification for the bastardisation of an english phrase. You get snatches of information. There's no evidence to suggest that i could care less came directly from yiddish, but the similarity is suggestive. Don't make me blue modern talking.