smackdown /ˈsmækdaʊn/ noun2 •(informal) A physical or emotional confrontation; a battle, a fight; also, a bitter rivalry."I'm not looking for any more sisterly smackdowns." She sat up and rubbed her arms where Paige and Juliana had been holding her. — 2004 •(informal) A significant or humiliating setback or defeat; a beating, a thrashing. formssmackdowns