Abstract‘Post-truth populism’ has received a prominent role in public and expert discourse over the past decade, gaining a further boost since the outbreak of the COVID-19 pandemic. Conventional narratives reveal three overarching assumptions about this ‘new political phenomenon’: (a) that it opposes truth, facts and evidence; (b) that it is profoundly emotional rather than rational; and (c) that it constitutes a threat to science. However, such a framing of ‘post-truth populism’ oversimplifies its complex and multifaceted nature. This chapter argues that the discursive construction of ‘post-truth populism’ is facilitated by the automatic adoption of an anti-populist perspective as a default point of departure in any discussion about populism. Despite widespread research on populism and post-truth, scholarly attention remains overly focused on the causes, and the consequences this phenomenon has on polity, policy and politics. As such, the role ‘post-truth populism’ plays as a signifier in public discourse is largely unexplored. Adopting a critical ethos, this chapter shifts the focus towards the language games surrounding it. Stressing the pivotal role of dominant socio-epistemic structures in constructing knowledge and truth as objective, it highlights the role political elites, experts and pundits play in post-truth politics. This chapter concludes that more attention and reflexivity is required when talking about ‘post-truth populism’, in that the wide and uncritical use of the term, and its a priori association with fake news, mis-/dis-information, anti-vax movements and the like, has both theoretical and socio-political implications. First, the elitism apparent in dominant discourse fails to capture why expert authorities are faced with backlash while conspiracies become popular—even against scientific evidence. Secondly, reactionary forms of anti-democratic and illiberal politics are disguised under the notion of ‘populist’ that functions as a euphemism.