This essay analyses Sartre's Nausea as a site of posthumanist revolt against the more humanistic sentiments of Being and Nothingness. Placing it alongside Derrida's exploration of animality and the human in The Animal That Therefore I Am, it examines the profusion of ‘bestial references’ in Sartre's text, and how the text promotes a postmodern openness to the multiplicity of existence by viewing the alterity of animals in a positive light.