This research presents and tests a trickle-down model of social undermining in the workplace. Drawing on social cognitive theory, this study specifically demonstrates that supervisor social undermining is positively associated with coworker social undermining in the workplace. Furthermore, this study argues that employee bottom-line mentality will exacerbate the positive relationship between supervisor social undermining and coworker social undermining, whereas employee self-efficacy will buffer this positive relationship. Overall, our findings support our proposed trickle-down model using field data obtained from several information technology and financial organizations in India. Theoretical and practical implications as well as directions for future research are discussed.