Castor oil is a non-edible vegetable oil, highly prized as a lubricant and is extracted from the seeds of the castor plant.
during the fascist regime, castor oil was one of the tools of physical and psychological torture employed by the Voluntary Militia for National Security, the Blackshirts. This instrument of torture was used against dissidents and political opponents. The same with the force were forced to swallow castor oil, while the trousers were tied with ropes to prevent them off to the victims of the attacks during toileting, forcing them to return home in conditions of great humiliation. This means of torture was designed by Gabriele D'Annunzio during l'occupazione di Fiume e ripetutamente usato come strumento intimidatorio contro i dissidenti durante tutto il ventennio fascista.