depression room

A depression room is an excessively messy room that's a result of months or possibly years of neglect due to mental health, usually depression. Common objects you can find in this room are rotten or molding foods, plastic wrappers, used dishes, mountains of clothes, bugs/insects or small animals (yes, it is very common to find little creepy crawlers in depression rooms), general trash and cluttered things.

The reason it's neglected to be cleaned is because the person who has depression or other mental health issues finds no motivation or better reason to clean their room. It's going to get messy all over again, so what's the point?

There is no shame in having having one of these. People with mental issues are going to find themselves in one of these at some point.

You, realizing this definition matches your living space: Oh shit, I have a depression room.

ass to none

Nothing. Nada. Zip.

Ass to none is just a way to say “little to nothing”, meaning there is a very small amount in either a literal or metaphorical sense depending on context.

Jenny: “How much was your paycheck this week?”
Kate: “Even with my overtime? Ass to none.”