[ogogmad]

"could care less" is sarcasm.

[_iyig]

It's also a nonsensical expression which some English speakers (rather good-naturedly) find bothersome, as comedian David Mitchell explains:

https://www.youtube.com/watch?v=om7O0MFkmpw

[ogogmad]

I know what it means and it could be interpreted as a sarcastic expression - so there's nothing to be bothered by.

[radoslawc]

I was going to post that video. but got distracted with work. I absolutely love David Mitchell.