A Weeaboo is someone who thinks they're japanese and pretend to speak it and end up look like retarded monkeys. they also have colored hair and hentai backpacks and shirts

A person who thinks Japan is some kind of god and praises the country, they think that Japan is superior and will often times call themselves Japanese. These people are usually hardcore anime fans, who develop their obsession and try to speak Japanese and will typically through in Japanese words in a conversation. To add to being a total ass hat they use honourifics on their own names and don't know a thing about Japan.

Someone who has become so obsessed with Japanese culture and anime that their brain melts into a pile of mush. Said person cannot speak one sentence without adding in a Japanese word.

a mostly derogatory slang term for a Western person who is obsessed with Japanese culture, especially anime, often regarding it as superior to all other cultures. They own body pillows, in which they cut holes in to fuck as if it’s a person, and find anime the only worthwhile thing ever. (Heres a tip: if you know weeaboos tell them to kill themselves.

Rachel, Is the complete definition of a weeaboo, She dresses like a Japanese school girl even though she is completely American, Watches mainstream animes and romcoms, She is an absolute disgrace to the Japanese culture and a disgrace to all Otakus out there.

Is a fucking Japanese wannabe who wants to be Japanese and live in Japan just because of anime.
Sounds pretty similar to word weirdo.
Shortened version is weeb

A weeaboo is a person that denys there actual race and really love anime and there new race is anime.