The article discusses the interrelationships between fatphobia, (re)existences and fat activism, regarding the experiences of fat women during the new coronavirus pandemic. The authors are based on their experiences as fat women, from an autoethnographic perspective, in dialogue with the theoretical-critical contribution that highlights the field of fat body studies, the decolonial movement, fat activism and decolonial feminism in dialogue with fat feminism. . The authors discuss how the pandemic of the new coronavirus highlighted fatphobia in Brazil, at the time it exacerbated it, as well as in what ways the activism of fat women has taken place in this process of confronting prejudice.