This paper wishes to contribute to the scholarly investigations of the far-right anti-gender mobilizations and the ideology underpinning them. It aims to connect two aspects in the reactionary narratives around the so-called “gender ideology”. First, drawing on Michael Freeden, it situates the discursive framing of “gender ideology” within the logic of conservative ideological grammar. Conservative thinking construes traditions from existing hierarchical orders and mirrors the conceptual apparatus of their ideological adversaries to subvert them. I will argue that the concept of “gender ideology” operates as a “combat concept” (via Koselleck) through which conservative ideologies construe an enemy for their critique of perceived social changes. This construction serves to protect the sexual and gender hierarchies deemed to be under threat by the egalitarian human rights project. Secondly, this discursive practice employs conspiracism. Here I will draw on the literature that views conspiracy theories as narrative instruments which serve the purposes of political propaganda. Conspiracy theories in this key do not always offer “theories” but aim for delegitimation and demonization of opponents with innuendo, without offering specifics (Muirhead & Rosenblum 2019). At the same time, gender ideology conspiracy theories follow a script like the one established by the far-right “cultural Marxism” conspiracy theory about the intellectual attempts to destroy Western civilization by subverting its values and taking over key institutions. I will illustrate on the case of Slovakia how deploying “gender ideology” rhetoric in political practice has exemplified conspiratorial thinking and was used to demonize political opponents and subvert political discussion.