A category 3 level of being down bad, being down cataclysmic can only be used to describe someone willing to go so low that one would have to otherwise be insane to commit such acts. Down Cataclysmic is so bad that one does not even need to respond with a sentence, they can just say "Down cataclysmic".
Similar to down horrendous and down bad, but much much worse.
"I took an 8 hour plane ride and $140 dollar Uber to see her, but she was busy that day, so I jerked off to her Bitmoji in the public bathroom and then went home."
"Down Cataclysmic.
While having vaginal intercourse with a woman and she is about to cum, pull out and squirt two or more packets of Taco Bell hot sauce inside her vaginal orifice. Then continue to plow her until she screams herself unconscious.
Becky and I made up. While I was banging her, I remembered that she farted at my Mom's funeral. Then I decided to teach that bitch a lesson, and I gave her a Cataclysmic Taco.