Although clinical nurses use online platforms to acquire health-related information and communicate with other healthcare providers, there are increasing reports on their incivility exposure in cyberspace. However, an in-depth understanding of their cyberincivility experience is lacking. This study aimed to identify Korean clinical nurses’ perception and experience of cyberincivility. A qualitative study was conducted. Twenty clinical nurses from seven private and public hospitals in the Seoul metropolitan area were recruited using purposive sampling. Individual semi-structured interviews were conducted with the nurses from June to September 2019. Conventional content analysis was applied for the interview data analysis. Clinical nurses perceived cyberincivility as disrespectful and condemning behavior as users hide under the shield of anonymity to persecute others without fear of retribution. Four themes regarding participants’ cyberincivility experience emerged: unprofessional behavior, hierarchical communication, lack of respect and morality, and forming an inefficient work environment. The results of this study provide an understanding regarding clinical nurses’ experience of cyberincivility that goes beyond that of previous studies, which mainly focused on students. These results could increase awareness of cyberincivility among clinical nurses, and provide key information for the design of cybercivility educational programs and guidelines to curb cyberincivility, nurture professional online communication, and consequently improve quality of care.