If you haven't noticed, this cat is bare naked. His name is Dirt. Because he's filthy. That's right.

Hot damn! Some delicious first fan art of Dirt by Neozones!
Dirt the alley cat!
Peter Griffin Sans Undertale Epic Moment? (Dirt fanart by Fletworld)
Fletworld Sans
Oh no (by Thoomas, done in less than two minutes, he told me.)
Thank you, lovely fan!