Cyberbullying is a major societal issue that is regrettably on the rise. Previous research on cyberbullying has almost entirely focused on the prevalence of cyberbullying among children or adolescents, and it is unknown how prevalent it is in the general population. This study reviews and synthesizes empirical studies related to adult cyberbullying to learn what we know, how well we know, and what we need to know about cyberbullying among adults. The research has explored that the current literature is fragmented and lacks an overarching framework from a socio-technical perspective to systematically guide future cyberbullying research. Moreover, researchers and practitioners continue to question a universal definition of cyberbullying co-developed with the changes in technology. Overall, the paper provides a more complete picture of cyberbullying continuum among adults, while identifying many opportunities for future researchers.