sb could not care less

/ˌɛsbˈiː kʊd nˌɒt kˈeə lˈɛs/

/ˌɛsbˈiː kʊd nˌɑːt kˈɛɹ lˈɛs/

used to say that a person is not interested or concerned about someone or something at all

Examples

1. He says he couldn't care less if he gets fired.

2. Number two: ultraviolet light We may think flowers are pretty, but honestly they couldn't care less about our feelings.

3. The idea came from that I hate politics, I find it so boring, so unaccessible, genuinely could not care less for it.

4. I couldn't care less about making more money.