This developmental paper is flagging up the issue of insufficiently clear definition of two contemporary concepts: social media and enterprise social media. Drawing on the findings from empirical case studies, differences in users’ perceptions of what is and is not social media are highlighted. These are juxtaposed with extant definitions from IS literature. The concept of “in-house” or “enterprise” social media is introduced from the literature and its clarity and necessity is challenged based on the data from the case studies. The aim of this early research paper is to evaluate whether a re-definition of “social media”, for example through performative lens is meaningful, necessary and helpful.