The term 'Bomb That Bombed' refers to the atomic bomb that was dropped on Hiroshima, Japan on August 6, 1945. The crossword solution for this term is 'DUD', which is an acronym for 'DUD explosive device'. This term is used to describe a bomb that fails to detonate or explode. The atomic bomb that was dropped on Hiroshima was a DUD, as it failed to detonate and caused much less destruction than expected.