Deicide (Also known as Choose or Loose 1) is a crime that is considered impossible to do, as gods are immortal, although this has not stopped people from trying. However, there have been certain people in history capable of killing a god, such as Chuck Norris and David Hasselhoff.
It is also considered a rather stupid thing to do, as killing a god would throw their world off-balance and possibly lead to the apocalypse.
There have been some notable deicide incidents in history, however....(They say God is dead for a reason)
Perhaps gods aren't quite as immortal as we once thought...
Ways To Kill A God
Apparently, a god can be killed if they are somehow stripped them of their immortality, although the exact way to do this is unknown.