Cthulhu is an H.P. Lovecraft character that has become popular among chatters.
He originates from a story by H.P. Lovecraft and is the most well known of the creatures from his books.
Cthulhu is famous for the story Mike made involving him with Asian hookers and going out with Sparda.
He is the President of the United States in the Nnemonic-verse.
Let's be honest if he fucking kills everyone who exists, would anyone even care? I mean, technically everyone would be dead, so there will be no one left to care, but imagine there was an outsider looking in. Would they be horrified, or would they be relieved that the human race has been completely wiped out? I'm betting more on the latter.