In this chapter, we examine the role of Discourse Studies in social media disinformation research. While currently underrepresented, Discourse Studies can provide key insights into why disinformation gains traction through credibility building, tapping into existing political narratives and stereotypes. Discourse Studies, we argue, can also bring much-needed attention to the constitutive role of antagonism in disinformation and to the connection between political practices, power relations and platform designs; aspects that are often overlooked. Drawing on three empirical cases - revolving around the Russian Internet Research Agency, fake Muslim Facebook pages and far-right conspiracy theories disguised as tabloid news - the chapter aims to provide a clearer view of the application of Discourse Studies (in its various forms) to disinformation.