not give a damn

• indifferentLacking interest or concern
• carelessInattentive, prone to mistakes
• apatheticWithout feeling or concern
• unbotheredNot disturbed or concerned
• shrugShoulder gesture of uncertainty

whatever · callous · cold · dismissive · nonchalant · unconcerned · blasé · detached · aloof · couldn't care less · brush off · ignore · neglect · disregard · who cares · meh · unfazed · heartless