A weapon of mass destruction is a weapon that can fuck people up really bad such as that bomb dropped on Hiroshima.
Man 1: âDude did you see that weapon of mass destruction that was dropped on Hiroshima? Do you think anyone survived?â
Man 2: âNo one survived that. Everyone was fucking blown up!â
An A-bomb is a weapon that was a precursor to the modern day nuke that was used on Hiroshima and Nagasaki at the end of world war 2
Person 1: Did you see that A-bomb that was dropped on Hiroshima it fucked up a lot of Chinese people there