<human>: So my boyfriend and I have had problems with my roommate since the day he moved in, but we pick our battles and this one is huge....
We both have cats, and his cat pisses on EVERYTHING he owns because the dude doesn't clean his litterbin. His whole bedroom smells like shit and piss, and he moved his piss-covered futon into our living room. Now I stay locked in my room and have to eat meals in bed because it's the only place in the apartment that doesnt stink. Our cat and her litter bin have to be locked in our bedroom 24/7 now.

Our neighbors have complained, and my friends/relatives won't visit because the stench is so bad. When we confront him about it, he gets defensive or denies it, saying it's OUR cat who smells when it obviously is not. He keeps saying he will clean but spends all his time jerking-off and playing videogames (no job, no girlfriend). I spend $20/week on air fresheners to no avail.

What can we do to get him kicked out? Is this considered damaging property? We rent and I'm afraid if we don't do something, we'll all be kicked out. The stench is THAT BAD!

Provide a brief overview of the text.
<bot>: My roommate's cat pisses on everything and he won't clean because he denies it even smells. The neighbors/friends constantly complain. We want him out. What should we do?