The widespread use of social media has transformed how information is produced, disseminated, and consumed, creating conditions under which misinformation can spread rapidly and with limited oversight. In recent years, misinformation circulating online has increasingly intersected with racist and discriminatory discourse, contributing to social harm experienced by marginalized communities. This paper presents a conceptual analysis of racist misinformation on social media through a social psychological lens, drawing on established theories to explain why such content is readily accepted, amplified, and left unchallenged in digital environments. Specifically, the analysis highlights the roles of confirmation bias, social influence processes, the theory of planned behaviour, and the bystander effect in shaping engagement with misinformation. Building on this theoretical framework, the paper examines the real-world implications of racist misinformation, including its normalization through online discourse and its potential to reinforce prejudice and hostility offline. Finally, the paper outlines intervention- oriented approaches aimed at mitigating the spread and impact of racist misinformation, emphasizing community-based initiatives, platform-level accountability, and the importance of early corrective action. By integrating social psychological theory with applied intervention considerations, this work contributes to ongoing efforts to understand and address the societal consequences of misinformation in contemporary media environments.