1. OK, you won. So what?

2. OK, you're getting married, what do I care?

3.You know what? I just couldn't care less.

4. OK, your English is better than mine. But I don't give a shit./ I don't give a crap./ I don't give a rat's ass./ I don't give a fuck.

5. OK, you're in trouble, but it's none of my business.

6. OK, you're leaving. But it doesn't have anything to do with me.