Based on a screen capture I took from Season 7: Nanarchy. I actually just kind of stumbled on it when I paused while watching it on Neflix then noticed it looked like a "Bitch, please" kind of expression, so I kept it.
I think this is my best Cat portrait so far. I actually tried to clean up the pencil lines so that the finished product looks less sketchy--mostly with "smart blur" and a bit of smudging. I probably could have done even a bit more of that, but I wanted to leave some of the lines alone. Still trying to perfect this method of coloring without inking first, but I'm nearly there now.
I also uploaded the pencil drawing this time around: https://www.weasyl.com/submission/236281/cat-study-4-pencil
After scanning it, I realized his upper lip looked too full, so I adjusted it with "liquify"--first time I've ever played with that option. I definitely like it.