Shinigami = Death god
This is Ryuk from the anime series Death Note. I am not a huge anime fan, but this is one series that I just loved. Shinigami in Death Note are basically beings that resemble the "Death" entity. They each carry a "Death Note" where they can write down the names of human beings to kill them, and in turn extend their own lifes. Ryuk was bored and decided to "drop" his Death Note in the human world so it came into the possession of a human being, which begins the series.