cavalier

1. ADJ If you describe a person or their behaviour as cavalier, you are criticizing them because you think that they do not consider other people's feelings or take account of the seriousness of a situation. 目空一切的; 漫不經心的[表不滿]

The editor takes a cavalier attitude to the concept of fact checking. 該編輯對事實核查持漫不經心的態度。