Taking a large dump so foul smelling that it is suspected of being part of a Mexican terrorist attack. Unlike a actual terrorist Dirty Bomb using radioactive material this is the Mexican equivalent using bean fueled Poo.
A man begins to have anal sex with a woman wearing a condom. He then pees in the condom while it's in the woman's Brown Hole and ties it off while it's still inside her. He then finds an Asian (any Asian will do) lays her underneath the anally violated woman and punches the woman in the ass causing a shitty urine like enema that unloads on the Asian below.
Asian: "Why do you want me to lay down under this woman's butthole?"
*Man punches woman in ass
Asian: "Nooo, it's worse than Godzilla poo"
Thus completing a Dirty A-Bomb over Tokyo"
It is a small bomb that countains radioactive matter. When it explodes the nuclear matter is spread for a long distance. The short term damage is done where the bomb explodes. The long term damage is the development of cancer in many residents in the areas that the radioactive material reaches.