With increased connectedness with colleagues on social media, the blurred line between life and work has become a new norm. Scant is known about how social media use affects work-related impressions. This study seeks to investigate the spillover effect of social media bragging in personal life on interpersonal impressions and collegial support at the workplace using a qualitative focus group approach. Drawing on insights from 7 focus group interviews in the UK and 6 in China among employees who had been exposed to their colleagues’ social media bragging, this study uncovered the nuanced dynamics of social media bragging—particularly travel-related and work-related bragging— and their influences on workplace impressions and collegial support, with a comparative lens on the UK and China. This study provides important implications on individual employees’ impression management strategies, and extended work relationship management in personal life in a connected social media era.