This paper explores the stigmatization of gendered conversation topics in workplace settings, focusing on the impact of female-gendered topics on perceptions of competency and engagement at work. Utilizing a mixed-method approach, the study first employs qualitative interviews with full-time employees to examine attitudes towards fashion—a prototypical female-gendered topic. Findings reveal that individuals interested in fashion, regardless of gender, anticipate negative evaluations and social sanctions, leading to self-regulation and environmental scanning before engaging in conversations about fashion at work. The paper then presents an experimental study to quantitatively assess the impact of discussing fashion versus sports (a male-gendered topic) on perceptions of agentic and communal characteristics, as well as work engagement. Results indicate that individuals engaging in fashion conversations are perceived as less agentic and less engaged in work compared to those discussing sports, highlighting a stigmatization associated with female-gendered conversation topics. This study contributes to the understanding of gendered workplace communication, its effects on professional dynamics, and offers insights into fostering more inclusive and equitable workplace conversations.