When Meta is down, the now famous "Meta Means Murder" image is shown. Where does that phrase come from?
Meta is Murder by Jeff Atwood.
This is likely the original source of the phrase and of the image. As Shmork writes in a comment:
I just spent 10 minutes looking for a "META IS MURDER" T-shirt before I realized that you had modified a "MEAT IS MURDER" one. D'oh.