I could care less
This is a stupid phrase that means the opposite of what it’s supposed to. It’s like saying you could care less, but really you couldn’t care less. It’s a dumb way to say you don’t care at all.
'I could care less about your stupid game,' said the kid who didn’t even play it.
'I could care less about the test,' said the kid who didn’t take it.
'I could care less about the homework,' said the kid who didn’t do it.