Don’t give a damn

1. Most companies don’t give a damn about the environment.

2. I don’t give a damn if she talks about me behind my back.

3. The movie was so boring that I didn’t give a damn about what the rest was about.

4. If you don’t give a damn about how I feel, stop asking me in the first place.

callous, cold, could care less, emotionless, indifferent, laid-back, passive, unconcerned, uninterested, uninvolved