1. A person so obsessed with japanese culture that they ignore their own.
2. Someone obsessed beyond healthy levels with anime.
3. People who ruin activities for other people with overzealous references to said anime.
4. People so oblivious to reality they only care about anime.
5. An action worthy of getting one's ass beaten.
1. Inuyasha fans
2. Americans claming to be "Otaku."
3. "Did you hear that kid? He won't shut up about how great Full Metal Alchemist is. Such a weeaboo."