I suppose you say “irregardless”, too

OK, people, it’s not “I could care less”, it’s “I couldn’t care less”.

Think about it. If you could care less, it would mean that you actually care some and that you could care at a level even lower than what you care right now (which probably isn’t what you meant). If you couldn’t care less, then you’re saying that it is not possible for you to care at a level lower than what you care right now (which is probably what you meant).

“I could care less!” So why don’t you?

If you’re going to show your indignation, at least do it correctly.