Definition of I or he, she, etc. couldn't North American informal also could care less in English:
informal Used to express complete indifference: he couldn’t care less about football [as adjective]: I started to get irritated by this couldn’t-care-less attitude
More example sentences
- Those on the right want more drilling and couldn't care less about conservation.
- By saying nothing to you about your achievements, it can seem to you as if they couldn't care less.
- It was good to be in a crowd of people who couldn't care less about blogging for part of the weekend.