I could care less
You mean "'COULDN'T' care less", because otherwise you are stating the opposite. People keep turning this phrase wrong, even in the mass media, and it's really starting to stick in my craw.
(Someone had better give me credit for using the term "stick in my craw" btw. I'm looking at you, BlackSox and Fury.)
Jeter, full credit given.
I LOVE "stick in my craw." I even use that in conversation.