The Movement Against Tyranny, or MAT, is a Philippine movement that seeks to protest alleged acts of tyranny by the administration of Philippine President Rodrigo Duterte. It was launched on August 28, 2017, at the Maryhill School of Theology in Quezon City in the wake of the killing of 17-year-old Kian delos Santos. The group also protests killings associated with the Philippines' war on drugs and harassment of media organizations.