@DaftHazard,
You are thinking the exact same thing I was thinking when I bought a firearm for concealed carry purposes seven years ago now: I'm not going to change how I dress, I want to have something really small, carry it in my pocket, and have it just in case.
I say: that's a perfectly fine attitude to have when you start out. The posters above recommended some pretty good firearms. I started out with a Kahr MK9 (it was pocketable, but I found that I preferred carrying it on my hip because of its weight.) I have a Kahr P380, too, and it's very easy to carry in a pocket when needed, definitely check those out. You might also want to check out the Glock 42 (.380).
Now with all that said, once you get a gun for carry purpose, do yourself a huge favor. Buy as much ammunition as you can possibly afford for it and then take a serious defensive pistol class. You're a martial artist; you know the importance not just of practicing, but of getting training so that you know *what* to practice, and also so that you can pick up the little things. Shooting stationary paper targets is not the same thing as fighting with a pistol.
ETA: By the way, shortly after I took the class, I reevaluated a few things, sold the Kahr, and now find myself carrying a Glock 19 in IWB or OWB holsters. Why? It 'works' better for me under stress than the Kahr MK9 did - something I learned after taking a training class. I also found that carrying a pistol in an IWB holster didn't require that many mods to my wardrobe.