Robert "Bazi" Weiß (21 April 1920 – 29 December 1944) was a Luftwaffe World War II fighter ace who served from 1939 until his death on 29 December 1944. A flying ace or fighter ace is a military aviator credited with shooting down five or more enemy aircraft during aerial combat. He was also a recipient of the Knight's Cross of the Iron Cross with Oak Leaves, the highest award in the military and paramilitary forces of Nazi Germany during World War II.