From Longman Dictionary of Contemporary Englishupendup‧end /ʌpˈend/ verb [transitive] TURNto turn something over so that it is upside down→ See Verb table
Examples from the Corpus
upend• Tables were overturned, chairs upended.• Rachaela put the portions into a dish and upended a can of Heinz tomato soup over them to make a casserole.• The three women ran up one flight of stairs to the procedure rooms and started upending drawers and destroying equipment.• And when Chris Allen was upended in the area, United probably thought they were home and dry.• Louis upended the bundle into the rainwater-butt.• Thérèse upended the empty bottle she carried, shaking it. 