Kotaku is a word invented by the website Kotaku, it is a mixture of the Japanese word Otaku, meaning
geek/nerd, and the letter K, which when combined forms a URL which is not Otaku.com, which must have been taken at the time.
Kotaku is commonly thought to be a video game news site, and also commonly thought to be a
geek/otaku blog, it is neither, it is in fact an
internet social experiment on how uninteresting commenters can be if they're all terrified of being banned for not being good little tools.
Kotaku is a mixed bag, with the topic at hand ever changing, but has
hard hitting articles such as "Don't be
homophobic" and "Look at the gifts Sony/Nintendo/Microsoft sent me" and "Look at this porn I found of Final Fantasy characters" and "Who wants to yiff with me in Second Life?" and "Talk amongst yourselves".