It's a crude message from your neighbor, ARBITRARY DICTATOR- a real asshole. You and he have a pretty big feud over the affection of the Queen. You get an office; he gets an office right next to yours. You get a gun for your job; he gets a bigger gun. You get put on an important case for the fate of the session; he cannot, great success.
You and he used to be friends. Used to. Now, if either of you see each other, their's bound to be someone loosing a tooth.
You've lost several teeth on this job. Most of them were from AD. But one of them, one of your incisors, was knocked out because some Dersian wasn't giving up the goods. You miss that tooth.