couldn't care less
idiomPart ofcould
couldn't care less — idiom
1. used to say very strongly that something is not important to you at all and you
1.idiom
Definition
used to say very strongly that something is not important to you at all and you have no interest in it
Example
Aaron said he could not care less about which team wins the game.
Zola could not care less whether her phone has the latest features or not.