Prisons are places of power and resistance. When the staff oppress prisoners, the latter participate in various forms of resistance, such as violence, substance misuse, riots, or protests to communicate a sense of injustice. Many of these struggles have been documented and discussed at length, revealing and communicating the national and local structures that produce them. However, potting remains a taboo on the wings and in criminological literature, where the use of bodily fluids as a means of prisoners rejecting penal power is rarely discussed beyond macro-political contexts. Drawing on symbolic interactionism and phenomenological approaches to knowledge, this paper challenges that taboo and proposes that potting is an embodied expression of oppression, a symbolic representation of prisoners’ defilement and a physical transference of their sense of injustice. Potting is a pervasive and perverse form of resistance.