The purpose of this research was to examine the Impact of Narcissistic Leadership (NL) on Employee’s Behavioral Cynicism (BOC) with the mediation of Organizational Aggression (OA) and moderation of Workplace Gossiping (WG) in the FMCG sector of Pakistan. OA was studied as a mediator that was brought in between the relationship of NL on BOC to see what impact it made on them. A quantitative method was used in this study, and the data was collected through survey questionnaires from 415 workers of FMCG companies operating in Pakistan using the convenience sampling technique, a type of non-probabilistic sampling. An adopted structured questionnaire was used in this research by using a cross-sectional study and a self-administered survey. SPSS is used for demographics frequency analysis, and SMART PLS 4 is used for SEM, validity and reliability analysis. However, H1 results revealed that NL had a significant impact on BOC. Whereas H2, looking at the mediation results,OA was found to have the mediation on the relationship between NL on EBC shows complete mediation. Further, H3, WG significantly moderated the relationship of NL with EBC. Therefore, the Leader member exchange (LMX) theory supports H1, the AET model supports H2 and self- verification & LMX theory supports H3.