you should go buy a noose and hang yourselves. While your at it record it, then again know would really notice because of how much of a waste of human air you are to this world. Either way, please do drink bleach and do yourself a favor to end your worthless life which consists of arguing in a video game over a joke

Originally お宅 otaku meant house - and as nerds and geeks tend to hang out in their house the word for them became Otaku.
In Japanese Otaku generally refers to a nerd of some sort - most usually a computer nerd with no physical abilities who is heavily into reading and other solitary pursuits. It can also refer to someone who has an unhealthy obsession for anything that is unphysical.